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Chapter 1. Certain Infectious and Parasitic Diseases (A00– B99)

a. Human immunodeficiency virus (HIV) infections 1) Code only confirmed cases Code only confirmed cases of HIV infection/illness. This is an exception to the hospital inpatient guideline Section II, H. In this context, “confirmation” does not require documentation of positive serology or culture for HIV; the provider’s diagnostic statement that the patient is HIV positive or has an HIV-related illness is sufficient.

 

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2) Selection and sequencing of HIV codes

(a) Patient admitted for HIV-related condition

 

If a patient is admitted for an HIV-related condition, the principal diagnosis should be B20, Human immunodeficiency virus [HIV] disease followed by additional diagnosis codes for all reported HIV related conditions.

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(b) Patient with HIV disease admitted for unrelated condition

If a patient with HIV disease is admitted for an unrelated condition (such as a traumatic injury), the code for the unrelated condition (e.g., the nature of injury code) should be the principal diagnosis. Other diagnoses would be B20 followed by additional diagnosis codes for all reported HIV-related conditions.

(c) Whether the patient is newly diagnosed Whether the patient is newly diagnosed or has had previous admissions/encounters for HIV conditions is irrelevant to the sequencing decision.

(d) Asymptomatic human immunodeficiency virus Z21, Asymptomatic human immunodeficiency virus [HIV] infection status, is to be applied when the patient without any documentation of symptoms is listed as being “HIV positive,” “known HIV,” “HIV test positive,” or similar terminology. Do not use this code if the term “AIDS” or “HIV disease” is used or if the patient is treated for any HIV-related illness or is described as having any condition(s) resulting from his/her HIV positive status; use B20 in these cases.

(e) Patients with inconclusive HIV serology Patients with inconclusive HIV serology, but no definitive diagnosis or manifestations of the illness, may be assigned code R75, Inconclusive laboratory evidence of human immunodeficiency virus [HIV].

 

(f) Previously diagnosed HIV-related illness Patients with any known prior diagnosis of an HIV related illness should be coded to B20. Once a patient has developed an HIV-related illness, the patient should always be assigned code B20 on every subsequent admission/encounter. Patients previously diagnosed with any HIV illness (B20) should never be assigned to R75 or Z21, Asymptomatic human immunodeficiency virus [HIV] infection status.

 

(g) HIV infection in pregnancy, childbirth and the puerperium During pregnancy, childbirth or the puerperium, a patient admitted (or presenting for a health care encounter) because of an HIV-related illness should receive a principal diagnosis code of O98.7-, Human immunodeficiency [HIV] disease complicating pregnancy, childbirth and the puerperium, followed by B20 and the code(s) for the HIV-related illness(es). Codes from Chapter 15 always take sequencing priority. Patients with asymptomatic HIV infection status admitted (or presenting for a health care encounter) during pregnancy, childbirth, or the puerperium should receive codes of O98.7- and Z21.

(h) Encounters for testing for HIV If a patient is being seen to determine his/her HIV status, use code Z11.4, Encounter for screening for human immunodeficiency virus [HIV]. Use additional codes for any associated high-risk behavior, if applicable.

If a patient with signs or symptoms is being seen for HIV testing, code the signs and symptoms. An additional counseling code Z71.7, Human immunodeficiency virus [HIV] counseling, may be used if counseling is provided during the encounter for the test. When a patient returns to be informed of his/her HIV test results and the test result is negative, use code Z71.7, Human immunodeficiency virus [HIV] counseling. If the results are positive, see previous guidelines and assign codes as appropriate.

(i) History of HIV managed by medication If a patient with documented history of HIV disease is currently managed on antiretroviral medications, assign code B20, Human immunodeficiency virus [HIV] disease. Code Z79.899, Other long term (current) drug therapy, may be assigned as an additional code to identify the long-term (current) use of antiretroviral medications.

b. Infectious agents as the cause of diseases classified to other chapters Certain infections are classified in chapters other than Chapter 1 and no organism is identified as part of the infection code. In these instances, it is necessary to use an additional code from Chapter 1 to identify the organism. A code from category B95, Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified to other chapters, B96, Other bacterial agents as the cause of diseases classified to other chapters, or B97, Viral agents as the cause of diseases classified to other chapters, is to be used as an additional code to identify the organism. An instructional note will be found at the infection code advising that an additional organism code is required.

c. Infections resistant to antibiotics Many bacterial infections are resistant to current antibiotics. It is necessary to identify all infections documented as antibiotic resistant. Assign a code from category Z16, Resistance to antimicrobial drugs, following the infection code only if the infection code does not identify drug resistance.

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d. Sepsis, severe sepsis, and septic shock

1) Coding of Sepsis and Severe Sepsis

(a) Sepsis

For a diagnosis of sepsis, assign the appropriate code for the underlying systemic infection. If the type of infection or causal organism is not further specified, assign code A41.9, Sepsis, unspecified organism. A code from subcategory R65.2, Severe sepsis, should not be assigned unless severe sepsis or an associated acute organ dysfunction is documented.

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(i) Negative or inconclusive blood cultures and sepsis Negative or inconclusive blood cultures do not preclude a diagnosis of sepsis in patients with clinical evidence of the condition; however, the provider should be queried.

(ii) Urosepsis The term urosepsis is a nonspecific term. It is not to be considered synonymous with sepsis. It has no default code in the Alphabetic Index. Should a provider use this term, he/she must be queried for clarification.

(iii) Sepsis with organ dysfunction If a patient has sepsis and associated acute organ dysfunction or multiple organ dysfunction (MOD), follow the instructions for coding severe sepsis.

(iv) Acute organ dysfunction that is not clearly associated with the sepsis If a patient has sepsis and an acute organ dysfunction, but the medical record documentation indicates that the acute organ dysfunction is related to a medical condition other than the sepsis, do not assign a code from subcategory R65.2, Severe sepsis. An acute organ dysfunction must be associated with the sepsis in order to assign the severe sepsis code. If the documentation is not clear as to whether an acute organ dysfunction is related to the sepsis or another medical condition, query the provider.

or hypercapnia

Explanation: Although acute organ dysfunction is present in the form of acute respiratory failure, severe sepsis (R65.2) is not coded in this example, as the acute respiratory failure is attributed to the COPD exacerbation rather than the sepsis. Sequencing of these codes would be determined by the reason for the encounter.

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(b) Severe sepsis The coding of severe sepsis requires a minimum of 2 codes: first a code for the underlying systemic infection, followed by a code from subcategory R65.2, Severe sepsis. If the causal organism is not documented, assign code A41.9, Sepsis, unspecified organism, for the infection. Additional code(s) for the associated acute organ dysfunction are also required. Due to the complex nature of severe sepsis, some cases may require querying the provider prior to assignment of the codes.

2) Septic shock Septic shock generally refers to circulatory failure associated with severe sepsis, and therefore, it represents a type of acute organ dysfunction. For cases of septic shock, the code for the systemic infection should be sequenced first, followed by code R65.21, Severe sepsis with septic shock or code T81.12, Postprocedural septic shock. Any additional codes for the other acute organ dysfunctions should also be assigned. As noted in the sequencing instructions in the Tabular List, the code for septic shock cannot be assigned as a principal diagnosis.

3) Sequencing of severe sepsis If severe sepsis is present on admission, and meets the definition of principal diagnosis, the underlying systemic infection should be assigned as principal diagnosis followed by the appropriate code from subcategory R65.2 as required by the sequencing rules in the Tabular List. A code from subcategory R65.2 can never be assigned as a principal diagnosis.

 

When severe sepsis develops during an encounter (it was not present on admission), the underlying systemic infection and the appropriate code from subcategory R65.2 should be assigned as secondary diagnoses.

 

Severe sepsis may be present on admission, but the diagnosis may not be confirmed until sometime after admission. If the documentation is not clear whether severe sepsis was present on admission, the provider should be queried.

4) Sepsis or severe sepsis with a localized infection If the reason for admission is sepsis or severe sepsis and a localized infection, such as pneumonia or cellulitis, a code(s) for the underlying systemic infection should be assigned first and the code for the localized infection should be assigned as a secondary diagnosis. If the patient has severe sepsis, a code from subcategory R65.2 should also be assigned as a secondary diagnosis. If the patient is admitted with a localized infection, such as pneumonia, and sepsis/severe sepsis doesn’t develop until after admission, the localized infection should be assigned first, followed by the appropriate sepsis/severe sepsis codes.

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5) Sepsis due to a postprocedural infection

 

(a) Documentation of causal relationship As with all postprocedural complications, code assignment is based on the provider’s documentation of the relationship between the infection and the procedure.

(b) Sepsis due to a postprocedural infection For infections following a procedure, a code from T81.40, to T81.43 Infection following a procedure, or a code from O86.00 to O86.03, Infection of obstetric surgical wound, that identifies the site of the infection should be coded first, if known. Assign an additional code for sepsis following a procedure (T81.44) or sepsis following an obstetrical procedure (O86.04). Use an additional code to identify the infectious agent. If the patient has severe sepsis, the appropriate code from subcategory R65.2 should also be assigned with the additional code(s) for any acute organ dysfunction. For infections following infusion, transfusion, therapeutic injection, or immunization, a code from subcategory T80.2, Infections following infusion, transfusion, and therapeutic injection, or code T88.0-, Infection following immunization, should be coded first, followed by the code for the specific infection. If the patient has severe sepsis, the appropriate code from subcategory R65.2 should also be assigned, with the additional codes(s) for any acute organ dysfunction.

(c) Postprocedural infection and postprocedural septic shock If a postprocedural infection has resulted in postprocedural septic shock, assign the codes indicated above for sepsis due to a postprocedural infection, followed by code T81.12-, Postprocedural septic shock. Do not assign code R65.21, Severe sepsis with septic shock. Additional code(s) should be assigned for any acute organ dysfunction.

6) Sepsis and severe sepsis associated with a noninfectious process (condition) In some cases, a noninfectious process (condition) such as trauma, may lead to an infection which can result in sepsis or severe sepsis. If sepsis or severe sepsis is documented as associated with a noninfectious condition, such as a burn or serious injury, and this condition meets the definition for principal diagnosis, the code for the noninfectious condition should be sequenced first, followed by the code for the resulting infection. If severe sepsis is present, a code from subcategory R65.2 should also be assigned with any associated organ dysfunction(s) codes. It is not necessary to assign a code from subcategory R65.1, Systemic inflammatory response syndrome (SIRS) of non-infectious origin, for these cases. If the infection meets the definition of principal diagnosis, it should be sequenced before the non infectious condition. When both the associated noninfectious condition and the infection meet the definition of principal diagnosis, either may be assigned as principal diagnosis. Only one code from category R65, Symptoms and signs specifically associated with systemic inflammation and infection, should be assigned. Therefore, when a noninfectious condition leads to an infection resulting in severe sepsis, assign the appropriate code from subcategory R65.2, Severe sepsis. Do not additionally assign a code from subcategory R65.1, Systemic inflammatory response syndrome (SIRS) of noninfectious origin.

7) Sepsis and septic shock complicating abortion, pregnancy, childbirth, and the puerperium See Section I.C.15. Sepsis and septic shock complicating abortion, pregnancy, childbirth and the puerperium

 

8) Newborn sepsis See Section I.C.16. f. Bacterial sepsis of Newborn

e. Methicillin resistant Staphylococcus aureus (MRSA) conditions

1) Selection and sequencing of MRSA codes

(a) Combination codes for MRSA infection

When a patient is diagnosed with an infection that is due to methicillin resistant Staphylococcus aureus (MRSA), and that infection has a combination code that includes the causal organism (e.g., sepsis, pneumonia) assign the appropriate combination code for the condition (e.g., code A41.02, Sepsis due to Methicillin resistant Staphylococcus aureus or code J15.212, Pneumonia due to Methicillin resistant Staphylococcus aureus). Do not assign code B95.62, Methicillin resistant Staphylococcus aureus infection as the cause of diseases classified elsewhere, as an additional code, because the combination code includes the type of infection and the MRSA organism. Do not assign a code from subcategory Z16.11, Resistance to penicillins, as an additional diagnosis. See Section C.1. for instructions on coding and sequencing of sepsis and severe sepsis.

(b) Other codes for MRSA infection When there is documentation of a current infection (e.g., wound infection, stitch abscess, urinary tract infection) due to MRSA, and that infection does not have a combination code that includes the causal organism, assign the appropriate code to identify the condition along with code B95.62, Methicillin resistant Staphylococcus aureus infection as the cause of diseases classified elsewhere for the MRSA infection. Do not assign a code from subcategory Z16.11, Resistance to penicillins.

(c) Methicillin susceptible Staphylococcus aureus (MSSA) and MRSA colonization The condition or state of being colonized or carrying MSSA or MRSA is called colonization or carriage, while an individual person is described as being colonized or being a carrier. Colonization means that MSSA or MSRA is present on or in the body without necessarily causing illness. A positive MRSA colonization test might be documented by the provider as “MRSA screen positive” or “MRSA nasal swab positive”. 

(d) MRSA colonization and infection If a patient is documented as having both MRSA colonization and infection during a hospital admission, code Z22.322, Carrier or suspected carrier of Methicillin resistant Staphylococcus aureus, and a code for the MRSA infection may both be assigned.

Chapter 1. Certain Infectious and Parasitic Diseases (A00-B99)

INCLUDES: diseases generally recognized as communicable or transmissible

Use additional code to identify resistance to antimicrobial drugs (Z16.-)

EXCLUDES 1: certain localized infections - see body systemrelated chapters

EXCLUDES 2: carrier or suspected carrier of infectious disease (Z22.-)

infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)

infectious and parasitic diseases specific to the perinatal period (P35-P39)

influenza and other acute respiratory infections (J00-J22)

This chapter contains the following blocks:

A00-A09   Intestinal infectious diseases

A15-A19   Tuberculosis

A20-A28   Certain zoonotic bacterial diseases

A30-A49   Other bacterial diseases

A50-A64   Infections with a predominantly sexual mode of transmission

A65-A69   Other spirochetal diseases

A70-A74   Other diseases caused by chlamydiae

A75-A79   Rickettsioses

A80-A89   Viral and prion infections of the central nervous system

A90-A99   Arthropod-borne viral fevers and viral hemorrhagic fevers

B00-B09   Viral infections characterized by skin and mucous membrane lesions

B10           Other human herpesviruses

B15-B19   Viral hepatitis

B20           Human immunodeficiency virus [HIV] disease

B25-B34   Other viral diseases

B35-B49   Mycoses

B50-B64   Protozoal diseases

B65-B83   Helminthiases

B85-B89   Pediculosis, acariasis and other infestations

B90-B94   Sequelae of infectious and parasitic diseases

B95-B97   Bacterial and viral infectious agents

B99           Other infectious diseases

Intestinal infectious diseases (A00-A09)

A00 Cholera

DEF: Acute infection of the bowel due to Vibrio cholerae that presents with profuse diarrhea, cramps, and vomiting, resulting in severe dehydration, electrolyte imbalance, and death. It is spread through ingestion of food or water contaminated with feces of infected persons.

A00.0 Cholera due to Vibrio cholerae 01,

biovar cholerae

Classical cholera

A00.1 Cholera due to Vibrio cholerae 01,

biovar eltor

Cholera eltor

A00.9 Cholera, unspecified

A01 Typhoid and paratyphoid fevers

DEF: Typhoid fever: Acute generalized illness caused by Salmonella typhi. Clinical features include fever, headache, abdominal pain, cough, toxemia, leukopenia, abnormal pulse, rose spots on the skin, bacteremia, hyperplasia of intestinal lymph nodes, mesenteric lymphadenopathy, and Peyer’s patches in the intestines.

DEF: Paratyphoid fever: Prolonged febrile illness, caused by Salmonella serotypes other than S. typhi, especially S. enterica serotypes paratyphi A, B, and C.

A01.0 Typhoid fever

           Infection due to Salmonella typhi

A01.00 Typhoid fever, unspecified

A01.01 Typhoid meningitis

A01.02 Typhoid fever with heart involvement

             Typhoid endocarditis

             Typhoid myocarditis

A01.03 Typhoid pneumonia

A01.04 Typhoid arthritis

A01.05 Typhoid osteomyelitis

A01.09 Typhoid fever with other complications 

A01.1 Paratyphoid fever A

A01.2 Paratyphoid fever B

A01.3 Paratyphoid fever C

A01.4 Paratyphoid fever, unspecified

Infection due to Salmonella paratyphi NOS

A02 Other salmonella infections

INCLUDES: infection or foodborne intoxication due to any Salmonella species other than S. typhi and S. paratyphi

A02.0 Salmonella enteritis Salmonellosis

TIP: Dehydration (E86.0) is a complication of salmonella enteritis and may be reported separately.

A02.1 Salmonella sepsis

A02.2 Localized salmonella infections

A02.20 Localized salmonella infection, unspecified

A02.21 Salmonella meningitis

A02.22 Salmonella pneumonia

A02.23 Salmonella arthritis

A02.24 Salmonella osteomyelitis

A02.25 Salmonella pyelonephritis

Salmonella tubulo-interstitial nephropathy

A02.29 Salmonella with other localized infection

A02.8 Other specified salmonella infections

A02.9 Salmonella infection, unspecified

A03 Shigellosis

DEF: Infection caused by the genus Shigella, of the family Enterobacteriaceae that is known to cause an acute dysenteric infection of the bowel with fever, drowsiness, anorexia, nausea, vomiting, bloody diarrhea, abdominal cramps, and distention.

A03.0 Shigellosis due to Shigella dysenteriae

Group A shigellosis [Shiga-Kruse dysentery]

A03.1 Shigellosis due to Shigella flexneri

Group B shigellosis

A03.2 Shigellosis due to Shigella boydii

Group C shigellosis

A03.3 Shigellosis due to Shigella sonnei

Group D shigellosis

A03.8 Other shigellosis A03.9 Shigellosis, unspecified

Bacillary dysentery NOS

 

A04 Other bacterial intestinal infection

EXCLUDES 1: bacterial foodborne intoxications, NEC (A05.-)

tuberculous enteritis (A18.32)

DEF: Escherichia coli: Gram-negative, anaerobic bacteria of the family Enterobacteriaceae found in the large intestine of warm-blooded animals, generally as a nonpathologic entity aiding in digestion. They become pathogenic when an opportunity to grow somewhere outside this relationship presents itself, such as ingestion of fecal-contaminated food or water

A04.0 Enteropathogenic Escherichia coli infection

A04.1 Enterotoxigenic Escherichia coli infection

A04.2 Enteroinvasive Escherichia coli infection

A04.3 Enterohemorrhagic Escherichia coli infection

DEF: E. coli infection penetrating the intestinal mucosa, producing microscopic ulceration and bleeding.

A04.4 Other intestinal Escherichia coli infections

Escherichia coli enteritis NOS

A04.5 Campylobacter enteritis

TIP: For Guillain-Barre syndrome occurring as a sequela of Campylobacter enteritis, assign code G61.0 as the first-listed diagnosis followed by B94.8 for the sequelae.

A04.6 Enteritis due to Yersinia enterocolitica

EXCLUDES 1: extraintestinal yersiniosis (A28.2)

A04.7 Enterocolitis due to Clostridium difficile

Foodborne intoxication by Clostridium difficile

Pseudomembraneous colitis

AHA: 2017,4Q,4

A04.71 Enterocolitis due to Clostridium difficile, recurrent

AHA: 2020,1Q,18

A04.72 Enterocolitis due to Clostridium difficile, not specified as recurrent

A04.8 Other specified bacterial intestinal infections

A04.9 Bacterial intestinal infection, unspecified

Bacterial enteritis NOS

 

A05 Other bacterial foodborne intoxications, not elsewhere classified 

EXCLUDES 1: Clostridium difficile foodborne intoxication and infection (A04.7-) Escherichia coli infection (A04.0-A04.4) listeriosis (A32.-) salmonella foodborne intoxication and infection (A02.-) toxic effect of noxious foodstuffs (T61- T62)

A05.0 Foodborne staphylococcal intoxication

TIP: Assign code A04.8 to report a staphylococcal infection when it is caused by the ingestion of contaminated food but not caused by S. aureus toxins.

A05.1 Botulism food poisoning

Botulism NOS Classical foodborne intoxication due to Clostridium botulinum

 EXCLUDES 1: infant botulism (A48.51)

                         wound botulism (A48.52)

DEF: Muscle-paralyzing neurotoxic disease caused by ingesting pre-formed toxin from the bacterium Clostridium botulinum. It causes vomiting and diarrhea, vision problems, slurred speech, difficulty swallowing, paralysis, and death.

A05.2 Foodborne Clostridium perfringens [Clostridium welchii] intoxication

Enteritis necroticans

Pig-bel

A05.3 Foodborne Vibrio parahaemolyticus intoxication

A05.4 Foodborne Bacillus cereus intoxication

A05.5 Foodborne Vibrio vulnificus intoxication

A05.8 Other specified bacterial foodborne intoxications

A05.9 Bacterial foodborne intoxication, unspecified

A06 Amebiasis

INCLUDES: infection due to Entamoeba histolytica

EXCLUDES 1: other protozoal intestinal diseases (A07.-)

EXCLUDES 2: acanthamebiasis (B60.1-) Naegleriasis (B60.2)

DEF: Infection with a single cell protozoan known as the amoeba. Transmission occurs through ingestion of feces, contaminated food or water, use of human feces as fertilizer, or person-to-person contact.

 

A06.0 Acute amebic dysentery

Acute amebiasis

Intestinal amebiasis NOS

A06.1 Chronic intestinal amebiasis

A06.2 Amebic nondysenteric colitis

A06.3 Ameboma of intestine

Ameboma NOS

A06.4 Amebic liver abscess

Hepatic amebiasis

A06.5 Amebic lung abscess Amebic abscess of lung (and liver)

A06.6 Amebic brain abscess

Amebic abscess of brain (and liver) (and lung)

A06.7 Cutaneous amebiasis

A06.8 Amebic infection of other sites

A06.81 Amebic cystitis

A06.82 Other amebic genitourinary infections

Amebic balanitis

Amebic vesiculitis

Amebic vulvovaginitis

A06.89 Other amebic infections

Amebic appendicitis

Amebic splenic abscess

A06.9 Amebiasis, unspecified

A07 Other protozoal intestinal diseases

DEF: Protozoa: Group comprised of the simplest, single celled organisms, ranging in size from micro to macroscopic. They can live alone or in colonies, and do not show any differentiation in tissues. Most are motile and can live free in nature, but some are parasitic, causing disease in the variety of hosts they inhabit.

 

A07.0 Balantidiasis

Balantidial dysentery

A07.1 Giardiasis [lambliasis]

DEF: Infection caused by the flagellate protozoan Giardia lamblia causing gastrointestinal problems such as vomiting, chronic diarrhea, and weight loss. The most common parasite in the U.S., this is usually transmitted by ingesting contaminated water while in the cyst state, after which it latches onto the wall of the small intestine.

A07.2 Cryptosporidiosis

DEF: Microscopic parasite found in water and one of the most common causes of waterborne gastrointestinal infectious disease in the United States. It is usually transmitted by ingesting contaminated drinking water or recreational water and causes profuse watery diarrhea, flatulence, abdominal pain, and cramping.

A07.3 Isosporiasis

Infection due to Isospora belli and Isospora hominis Intestinal coccidiosis Isosporosis

A07.4 Cyclosporiasis

A07.8 Other specified protozoal intestinal diseases

Intestinal microsporidiosis

Intestinal trichomoniasis

Sarcocystosis

Sarcosporidiosis

A07.9 Protozoal intestinal disease, unspecified

Flagellate diarrhea

Protozoal colitis

Protozoal diarrhea

Protozoal dysentery

A08 Viral and other specified intestinal infections

EXCLUDES 1: influenza with involvement of gastrointestinal tract (J09.X3, J10.2, J11.2)

A08.0 Rotaviral enteritis

A08.1 Acute gastroenteropathy due to Norwalk agent and other small round viruses

A08.11 Acute gastroenteropathy due to Norwalk agent

Acute gastroenteropathy due to Norovirus

Acute gastroenteropathy due to Norwalk-like agent

A08.19 Acute gastroenteropathy due to other small round viruses

Acute gastroenteropathy due to small round virus [SRV] NOS

A08.2 Adenoviral enteritis

A08.3 Other viral enteritis

A08.31 Calicivirus enteritis

A08.32 Astrovirus enteritis

A08.39 Other viral enteritis

Coxsackie virus enteritis

Echovirus enteritis

Enterovirus enteritis NEC

Torovirus enteritis

A08.4 Viral intestinal infection, unspecified

Viral enteritis NOS

Viral gastroenteritis NOS

Viral gastroenteropathy NOS

AHA: 2016,3Q,12

A08.8 Other specified intestinal infections

A09 Infectious gastroenteritis and colitis, unspecified

Infectious colitis NOS Infectious enteritis NOS Infectious gastroenteritis NOS

EXCLUDES 1: colitis NOS (K52.9)

                        diarrhea NOS (R19.7)

                        enteritis NOS (K52.9)

                        gastroenteritis NOS (K52.9)

                        noninfective gastroenteritis and colitis, unspecified (K52.9)

DEF: Colitis: Inflammation of mucous membranes of the colon.

DEF: Enteritis: Inflammation of mucous membranes of the small intestine.

DEF: Gastroenteritis: Inflammation of mucous membranes of the stomach and intestines.

Tuberculosis (A15-A19)

INCLUDES: infections due to Mycobacterium tuberculosis and Mycobacterium bovis

EXCLUDES 1: congenital tuberculosis (P37.0) nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-) pneumoconiosis associated with tuberculosis, any type in A15 (J65) positive PPD (R76.11) positive tuberculin skin test without active tuberculosis (R76.11) sequelae of tuberculosis (B90.-) silicotuberculosis (J65)

DEF: Bacterial infection that typically spreads by inhalation of an airborne agent that usually attacks the lungs, but may also affect other organs.

A15 Respiratory tuberculosis A15.0 Tuberculosis of lung

Tuberculous bronchiectasis

Tuberculous fibrosis of lung

Tuberculous pneumonia

Tuberculous pneumothorax

A15.4 Tuberculosis of intrathoracic lymph nodes

Tuberculosis of hilar lymph nodes Tuberculosis of mediastinal lymph nodes Tuberculosis of tracheobronchial lymph nodes

EXCLUDES 1: tuberculosis specified as primary (A15.7)

A15.5 Tuberculosis of larynx, trachea and bronchus 

Tuberculosis of bronchus

Tuberculosis of glottis

Tuberculosis of larynx

Tuberculosis of trachea

A15.6 Tuberculous pleurisy

Tuberculosis of pleura Tuberculous empyema

EXCLUDES 1: primary respiratory tuberculosis (A15.7)

A15.7 Primary respiratory tuberculosis

A15.8 Other respiratory tuberculosis 

Mediastinal tuberculosis

Nasopharyngeal tuberculosis

Tuberculosis of nose

Tuberculosis of sinus [any nasal]

A15.9 Respiratory tuberculosis unspecified

A17 Tuberculosis of nervous system

 

A17.0 Tuberculous meningitis 

Tuberculosis of meninges (cerebral)(spinal) Tuberculous leptomeningitis

EXCLUDES 1: tuberculous meningoencephalitis (A17.82)

A17.1 Meningeal tuberculoma

Tuberculoma of meninges (cerebral) (spinal)

EXCLUDES 2: tuberculoma of brain and spinal cord (A17.81)

A17.8 Other tuberculosis of nervous system

A17.81 Tuberculoma of brain and spinal cord

Tuberculous abscess of brain and spinal cord

A17.82 Tuberculous meningoencephalitis

Tuberculous myelitis

A17.83 Tuberculous neuritis

Tuberculous mononeuropathy

A17.89 Other tuberculosis of nervous system

Tuberculous polyneuropathy

A17.9 Tuberculosis of nervous system, unspecified

A18 Tuberculosis of other organs

A18.0 Tuberculosis of bones and joints

A18.01 Tuberculosis of spine

Pott’s disease or curvature of spine

Tuberculous arthritis

Tuberculous osteomyelitis of spine

Tuberculous spondylitis

A18.02 Tuberculous arthritis of other joints

Tuberculosis of hip (joint)

Tuberculosis of knee (joint)

A18.03 Tuberculosis of other bones

Tuberculous mastoiditis

Tuberculous osteomyelitis

A18.09 Other musculoskeletal tuberculosis

Tuberculous myositis

Tuberculous synovitis

Tuberculous tenosynovitis

A18.1 Tuberculosis of genitourinary system

A18.10 Tuberculosis of genitourinary system, unspecified

A18.11 Tuberculosis of kidney and ureter

A18.12 Tuberculosis of bladder

A18.13 Tuberculosis of other urinary organs

Tuberculous urethritis

A18.14 Tuberculosis of prostate

A18.15 Tuberculosis of other male genital organs

A18.16 Tuberculosis of cervix

A18.17 Tuberculous female pelvic inflammatory disease

Tuberculous endometritis

Tuberculous oophoritis and salpingitis

A18.18 Tuberculosis of other female genital organs

Tuberculous ulceration of vulva

A18.2 Tuberculous peripheral lymphadenopathy

Tuberculous adenitis

EXCLUDES 2: tuberculosis of bronchial and mediastinal lymph nodes (A15.4) tuberculosis of mesenteric and retroperitoneal lymph nodes (A18.39) tuberculous tracheobronchial adenopathy (A15.4)

A18.3 Tuberculosis of intestines, peritoneum and mesenteric glands

A18.31 Tuberculous peritonitis 

Tuberculous ascites

DEF: Tuberculous inflammation of the membrane lining the abdomen. 

A18.32 Tuberculous enteritis

Tuberculosis of anus and rectum

Tuberculosis of intestine (large) (small)

A18.39 Retroperitoneal tuberculosis

Tuberculosis of mesenteric glands

Tuberculosis of retroperitoneal (lymph glands)

A18.4 Tuberculosis of skin and subcutaneous tissue 

Erythema induratum, tuberculous

Lupus excedens

Lupus vulgaris NOS

Lupus vulgaris of eyelid

Scrofuloderma

Tuberculosis of external ear

EXCLUDES 2: lupus erythematosus (L93.-) systemic lupus erythematosus (M32.-)

A18.5 Tuberculosis of eye

EXCLUDES 2: lupus vulgaris of eyelid (A18.4)

A18.50 Tuberculosis of eye, unspecified

A18.51 Tuberculous episcleritis

A18.52 Tuberculous keratitis

Tuberculous interstitial keratitis

Tuberculous keratoconjunctivitis (interstitial) (phlyctenular)

A18.53 Tuberculous chorioretinitis

A18.54 Tuberculous iridocyclitis

A18.59 Other tuberculosis of eye

Tuberculous conjunctivitis

A18.6 Tuberculosis of (inner) (middle) ear

Tuberculous otitis media

EXCLUDES 2: tuberculosis of external ear (A18.4)

                        tuberculous mastoiditis (A18.03)

A18.7 Tuberculosis of adrenal glands

Tuberculous Addison’s disease

A18.8 Tuberculosis of other specified organs

A18.81 Tuberculosis of thyroid gland

A18.82 Tuberculosis of other endocrine glands

Tuberculosis of pituitary gland

Tuberculosis of thymus gland

A18.83 Tuberculosis of digestive tract organs, not elsewhere classified

EXCLUDES 1: tuberculosis of intestine (A18.32)

A18.84 Tuberculosis of heart

Tuberculous cardiomyopathy

Tuberculous endocarditis

Tuberculous myocarditis

Tuberculous pericarditis

A18.85 Tuberculosis of spleen

A18.89 Tuberculosis of other sites

Tuberculosis of muscle

Tuberculous cerebral arteritis

A19 Miliary tuberculosis

INCLUDES: disseminated tuberculosis

                     generalized tuberculosis

                     tuberculous polyserositis

A19.0 Acute miliary tuberculosis of a single specified site

A19.1 Acute miliary tuberculosis of multiple sites

A19.2 Acute miliary tuberculosis, unspecified

A19.8 Other miliary tuberculosis

A19.9 Miliary tuberculosis, unspecifie

Certain zoonotic bacterial diseases (A20-A28)

A20 Plague

INCLUDES: infection due to Yersinia pestis

 

A20.0 Bubonic plague

A20.1 Cellulocutaneous plague

A20.2 Pneumonic plague

A20.3 Plague meningitis

A20.7 Septicemic plague

A20.8 Other forms of plague

Abortive plague

Asymptomatic

plague Pestis minor

A20.9 Plague, unspecified

A21 Tularemia

INCLUDES: deer-fly fever infection due to Francisella tularensis rabbit fever

DEF: Febrile disease transmitted to humans by the bites of deer flies, fleas, and ticks, by inhaling aerosolized F. tularensis, or by ingesting contaminated food or water. Patients quickly develop fever, chills, weakness, headache, backache, and malaise.

A21.0 Ulceroglandular tularemia

A21.1 Oculoglandular tularemia

Ophthalmic tularemia

A21.2 Pulmonary tularemia

A21.3 Gastrointestinal tularemia

Abdominal tularemia

A21.7 Generalized tularemia

A21.8 Other forms of tularemia

A21.9 Tularemia, unspecified 

A22 Anthrax

INCLUDES: infection due to Bacillus anthracis

 

A22.0 Cutaneous anthrax

Malignant carbuncle

Malignant pustule

A22.1 Pulmonary anthrax Inhalation anthrax Ragpicker’s disease Woolsorter’s disease

A22.2 Gastrointestinal anthrax

A22.7 Anthrax sepsis

A22.8 Other forms of anthrax 

Anthrax meningitis

 A22.9 Anthrax, unspecified 

 

A23 Brucellosis

INCLUDES: Malta fever

                    Mediterranean fever

                    undulant fever

A23.0 Brucellosis due to Brucella melitensis

A23.1 Brucellosis due to Brucella abortus

A23.2 Brucellosis due to Brucella suis

A23.3 Brucellosis due to Brucella canis

A23.8 Other brucellosis

A23.9 Brucellosis, unspecified 

A24 Glanders and melioidosis

 

A24.0 Glanders

Infection due to Pseudomonas mallei Malleus

A24.1 Acute and fulminating melioidosis

Melioidosis pneumonia

Melioidosis sepsis

A24.2 Subacute and chronic melioidosis

A24.3 Other melioidosis

A24.9 Melioidosis, unspecified

Infection due to Pseudomonas pseudomallei NOS

Whitmore’s disease

A25 Rat-bite fevers

 

A25.0 Spirillosis

Sodoku

A25.1 Streptobacillosis

Epidemic arthritic erythema

Haverhill fever

Streptobacillary rat-bite fever

A25.9 Rat-bite fever, unspecified

A26 Erysipeloid

DEF: Acute cutaneous infection typically caused by trauma to the skin. Presenting as cellulitis, it may become systemic, affecting other organs. It is a gram-positive bacillus and mainly acquired by those who routinely handle meat.

A26.0 Cutaneous erysipeloid

Erythema migrans

A26.7 Erysipelothrix sepsis

A26.8 Other forms of erysipeloid

A26.9 Erysipeloid, unspecified

A27 Leptospirosis

 

A27.0 Leptospirosis icterohemorrhagica

Leptospiral or spirochetal jaundice (hemorrhagic) Weil’s disease

A27.8 Other forms of leptospirosis

A27.81 Aseptic meningitis in leptospirosis

A27.89 Other forms of leptospirosis

A27.9 Leptospirosis, unspecified 

A28 Other zoonotic bacterial diseases, not elsewhere classified

 

A28.0 Pasteurellosis

A28.1 Cat-scratch disease

Cat-scratch fever

A28.2 Extraintestinal yersiniosis

EXCLUDES 1: enteritis due to Yersinia enterocolitica (A04.6)

A28.8 Other specified zoonotic bacterial diseases, not elsewhere classified

A28.9 Zoonotic bacterial disease, unspecified 

 Other bacterial diseases (A30-A49) 

AHA: 2016,3Q,8-14 

A30 Leprosy [Hansen’s disease]

INCLUDES: infection due to Mycobacterium leprae

EXCLUDES: 1 sequelae of leprosy (B92)

A30.0 Indeterminate leprosy

I leprosy

A30.1 Tuberculoid leprosy

TT leprosy

A30.2 Borderline tuberculoid leprosy

BT leprosy

A30.3 Borderline leprosy

BB leprosy

A30.4 Borderline lepromatous leprosy

BL leprosy

A30.5 Lepromatous leprosy

LL leprosy

A30.8 Other forms of leprosy

A30.9 Leprosy, unspecified 

A31 Infection due to other mycobacteria

EXCLUDES 2: leprosy (A30.-) tuberculosis (A15-A19)

 

A31.0 Pulmonary mycobacterial infection

Infection due to Mycobacterium avium Infection due to Mycobacterium intracellulare [Battey bacillus] Infection due to Mycobacterium kansasii

A31.1 Cutaneous mycobacterial infection

Buruli ulcer Infection due to Mycobacterium marinum

Infection due to Mycobacterium ulcerans

A31.2 Disseminated mycobacterium avium-intracellulare complex (DMAC)

MAC sepsis

A31.8 Other mycobacterial infections

A31.9 Mycobacterial infection, unspecified

Atypical mycobacterial infection NOS

Mycobacteriosis NOS

A32 Listeriosis

INCLUDES: listerial foodborne infection

EXCLUDES 1: neonatal (disseminated) listeriosis (P37.2)

 

A32.0 Cutaneous listeriosis

 A32.1 Listerial meningitis and meningoencephalitis

A32.11 Listerial meningitis

A32.12 Listerial meningoencephalitis

A32.7 Listerial sepsis

A32.8 Other forms of listeriosis

A32.81 Oculoglandular listeriosis

A32.82 Listerial endocarditis

A32.89 Other forms of listeriosis

Listerial cerebral arteritis

A32.9 Listeriosis, unspecified

A33 Tetanus neonatorum

A34 Obstetrical tetanus

A35 Other tetanus

Tetanus NOS

EXCLUDES 1: obstetrical tetanus (A34)

                        tetanus neonatorum (A33)

DEF: Tetanus: Acute, often fatal, infectious disease caused by the anaerobic, spore-forming bacillus Clostridium tetani. The bacillus enters the body through a contaminated wound, burns, surgical wounds, or cutaneous ulcers. Symptoms include lockjaw, spasms, seizures, and paralysis.

A36 Diphtheria

 

A36.0 Pharyngeal diphtheria

Diphtheritic membranous angina

Tonsillar diphtheria

A36.1 Nasopharyngeal diphtheria

A36.2 Laryngeal diphtheria

Diphtheritic laryngotracheitis

A36.3 Cutaneous diphtheria

EXCLUDES 2: erythrasma (L08.1)

A36.8 Other diphtheria

A36.81 Diphtheritic cardiomyopathy

Diphtheritic myocarditis

A36.82 Diphtheritic radiculomyelitis

A36.83 Diphtheritic polyneuritis

A36.84 Diphtheritic tubulo-interstitial nephropathy

A36.85 Diphtheritic cystitis

A36.86 Diphtheritic conjunctivitis

A36.89 Other diphtheritic complications

Diphtheritic peritonitis

A36.9 Diphtheria, unspecified

A37 Whooping cough

 

DEF: Acute, highly contagious respiratory tract infection caused by Bordetella pertussis and B. bronchiseptica. Whooping cough is known by its characteristic paroxysmal cough.

A37.0 Whooping cough due to Bordetella pertussis

A37.00 Whooping cough due to Bordetella pertussis without pneumonia

▶Paroxysmal cough due to Bordetella pertussis without pneumonia◀

A37.01 Whooping cough due to Bordetella pertussis with pneumonia

▶Paroxysmal cough due to Bordetella pertussis with pneumonia◀

A37.1 Whooping cough due to Bordetella parapertussis

A37.10 Whooping cough due to Bordetella parapertussis without pneumonia

A37.11 Whooping cough due to Bordetella parapertussis with pneumonia

A37.8 Whooping cough due to other Bordetella species

A37.80 Whooping cough due to other Bordetella species without pneumonia

A37.81 Whooping cough due to other Bordetella species with pneumonia

A37.9 Whooping cough, unspecified species

A37.90 Whooping cough, unspecified species without pneumonia

A37.91 Whooping cough, unspecified species with pneumonia

 

A38 Scarlet fever

INCLUDES: scarlatina

EXCLUDES 2: streptococcal sore throat (J02.0)

DEF: Acute contagious disease caused by Group A bacteria, the same bacterium that causes strep throat. Individuals with strep throat can develop scarlet fever particularly if the infection is not treated with antibiotics. It is characterized by a red blush to the skin of the chest and abdomen and swelling of the nose, throat, and mouth.

 

A38.0 Scarlet fever with otitis media

A38.1 Scarlet fever with myocarditis

A38.8 Scarlet fever with other complications

A38.9 Scarlet fever, uncomplicated

Scarlet fever, NOS

A39 Meningococcal infection

DEF: Condition caused by Neisseria meningitidis, a bacteria that may invade the spinal cord, brain, heart, joints, optic nerve, or bloodstream.

A39.0 Meningococcal meningitis

A39.1 Waterhouse-Friderichsen syndrome

Meningococcal hemorrhagic adrenalitis

Meningococcic adrenal syndrome

A39.2 Acute meningococcemia

A39.3 Chronic meningococcemia

A39.4 Meningococcemia, unspecified

A39.5 Meningococcal heart disease

A39.50 Meningococcal carditis, unspecified

A39.51 Meningococcal endocarditis

A39.52 Meningococcal myocarditis

A39.53 Meningococcal pericarditis

 A39.8 Other meningococcal infections

A39.81 Meningococcal encephalitis

A39.82 Meningococcal retrobulbar neuritis

A39.83 Meningococcal arthritis

A39.84 Postmeningococcal arthritis

A39.89 Other meningococcal infections

Meningococcal conjunctivitis

A39.9 Meningococcal infection, unspecified

Meningococcal disease NOS

A40 Streptococcal sepsis

Code first: postprocedural streptococcal sepsis (T81.4-) streptococcal sepsis during labor (O75.3) streptococcal sepsis following abortion or ectopic or molar pregnancy (O03-O07, O08.0) streptococcal sepsis following immunization (T88.0) streptococcal sepsis following infusion, transfusion or therapeutic injection (T80.2-)

EXCLUDES 1: neonatal (P36.0-P36.1) puerperal sepsis (O85) sepsis due to Streptococcus, group D (A41.81)

AHA: 2020,2Q,8,28; 2019,4Q,65; 2018,4Q,89; 2018,1Q,16; 2016,1Q,32

 

A40.0 Sepsis due to streptococcus, group A

A40.1 Sepsis due to streptococcus, group B

AHA: 2019,1Q,14

A40.3 Sepsis due to Streptococcus pneumoniae Pneumococcal sepsis

A40.8 Other streptococcal sepsis

A40.9 Streptococcal sepsis, unspecified ✓4 th A41 Other sepsis

Code first: postprocedural sepsis (T81.4-) sepsis during labor (O75.3) sepsis following abortion, ectopic or molar pregnancy (O03-O07, O08.0) sepsis following immunization (T88.0) sepsis following infusion, transfusion or therapeutic injection (T80.2-)

EXCLUDES 1: bacteremia NOS (R78.81) neonatal (P36.-) puerperal sepsis (O85) streptococcal sepsis (A40.-)

EXCLUDES 2: sepsis (due to) (in) actinomycotic (A42.7) sepsis (due to) (in) anthrax (A22.7) sepsis (due to) (in) candidal (B37.7) sepsis (due to) (in) Erysipelothrix (A26.7) sepsis (due to) (in) extraintestinal yersiniosis (A28.2) sepsis (due to) (in) gonococcal (A54.86) sepsis (due to) (in) herpesviral (B00.7) sepsis (due to) (in) listerial (A32.7) sepsis (due to) (in) melioidosis (A24.1) sepsis (due to) (in) meningococcal (A39.2-A39.4) sepsis (due to) (in) plague (A20.7) sepsis (due to) (in) tularemia (A21.7) toxic shock syndrome (A48.3)

AHA: 2020,2Q,8,28; 2019,4Q,65; 2019,3Q,17; 2018,4Q,18; 2018,1Q,16; 2016,1Q,32; 2014,2Q,13

A41.0 Sepsis due to Staphylococcus aureus

A41.01 Sepsis due to Methicillin susceptible Staphylococcus aureus MSSA sepsis Staphylococcus aureus sepsis NOS

AHA: 2020,2Q,17

A41.02 Sepsis due to Methicillin resistant Staphylococcus aureus

A41.1 Sepsis due to other specified staphylococcus

Coagulase negative staphylococcus sepsis

A41.2 Sepsis due to unspecified staphylococcus

A41.3 Sepsis due to Hemophilus influenzae

A41.4 Sepsis due to anaerobes

EXCLUDES 1: gas gangrene (A48.0)

A41.5 Sepsis due to other Gram-negative organisms

A41.50 Gram-negative sepsis, unspecified Gram-negative sepsis NOS

AHA: 2020,2Q,28

A41.51 Sepsis due to Escherichia coli [E. coli]

AHA: 2020,2Q,17

A41.52 Sepsis due to Pseudomonas

Pseudomonas aeroginosa

A41.53 Sepsis due to Serratia

A41.59 Other Gram-negative sepsis

A41.8 Other specified sepsis

A41.81 Sepsis due to Enterococcus

TIP: E. faecium, is a species of Enterococcus that is highly resistant to multiple antibiotics. Assign a code from category Z16 when resistance to antimicrobial drugs is documented.

A41.89 Other specified sepsis

AHA: 2020,2Q,8; 2017,1Q,51; 2016,3Q,8-14

A41.9 Sepsis, unspecified organism

Septicemia NOS

AHA: 2020,2Q,28

A42 Actinomycosis

EXCLUDES 1: actinomycetoma (B47.1)

A42.0 Pulmonary actinomycosis

A42.1 Abdominal actinomycosis

A42.2 Cervicofacial actinomycosis

A42.7 Actinomycotic sepsis

A42.8 Other forms of actinomycosis

A42.81 Actinomycotic meningitis

A42.82 Actinomycotic encephalitis

A42.89 Other forms of actinomycosis

A42.9 Actinomycosis, unspecified

 

A43 Nocardiosis

DEF: Rare bacterial infection occurring most often in those with weakened immune systems. Can be acquired in soil, decaying plants, or standing water. It typically begins in the lungs and has a tendency to spread to other body systems.

A43.0 Pulmonary nocardiosis

A43.1 Cutaneous nocardiosis

A43.8 Other forms of nocardiosis

A43.9 Nocardiosis, unspecified

 

A44 Bartonellosis

 

A44.0 Systemic bartonellosis Oroya fever

A44.1 Cutaneous and mucocutaneous bartonellosis

Verruga peruana

A44.8 Other forms of bartonellosis

A44.9 Bartonellosis, unspecified

 

A46 Erysipelas

EXCLUDES 1: postpartum or puerperal erysipelas (O86.89)

DEF: Skin infection affecting the upper dermis and superficial dermal lymphatics. Lesion edges are well-demarcated with distinct raised borders. It is often caused by group A Streptococci.

 

A48 Other bacterial diseases, not elsewhere classified

EXCLUDES 1: actinomycetoma (B47.1)

 

A48.0 Gas gangrene

Clostridial cellulitis

Clostridial myonecrosis

AHA: 2017,4Q,102

A48.1 Legionnaires’ disease

DEF: Severe and often fatal infection by Legionella pneumophila. Symptoms include high fever, gastrointestinal pain, headache, myalgia, dry cough, and pneumonia and it is usually transmitted through airborne water droplets via air conditioning systems or hot tubs.

A48.2 Nonpneumonic Legionnaires’ disease [Pontiac fever]

A48.3 Toxic shock syndrome

Use additional code to identify the organism (B95, B96)

EXCLUDES 1: hock NOS (R57.8) sepsis NOS (A41.9)

DEF: Bacteria producing an endotoxin, such as Staphylococci, flood the body with the toxins producing a high fever, vomiting and diarrhea, decreasing blood pressure, a skin rash, and shock. Synonym(s): TSS.

A48.4 Brazilian purpuric fever

Systemic Hemophilus aegyptius infection

A48.5 Other specified botulism

Non-foodborne intoxication due to toxins of Clostridium botulinum [C. botulinum]

EXCLUDES 1: food poisoning due to toxins of Clostridium botulinum (A05.1)

A48.51 Infant botulism

A48.52 Wound botulism

Non-foodborne botulism NOS

Use additional code for associated wound

A48.8 Other specified bacterial diseases

 

A49 Bacterial infection of unspecified site

EXCLUDES 1: bacterial agents as the cause of diseases classified elsewhere (B95-B96) chlamydial infection NOS (A74.9) meningococcal infection NOS (A39.9) rickettsial infection NOS (A79.9) spirochetal infection NOS (A69.9)

 

A49.0 Staphylococcal infection, unspecified site

A49.01 Methicillin susceptible Staphylococcus aureus infection, unspecified site Methicillin susceptible Staphylococcus aureus (MSSA) infection Staphylococcus aureus infection NOS

A49.02 Methicillin resistant Staphylococcus aureus infection, unspecified site Methicillin resistant Staphylococcus aureus (MRSA) infection

A49.1 Streptococcal infection, unspecified site

A49.2 Hemophilus influenzae infection, unspecified site

A49.3 Mycoplasma infection, unspecified site

A49.8 Other bacterial infections of unspecified site

A49.9 Bacterial infection, unspecified

EXCLUDES 1: bacteremia NOS (R78.81)

Infections with a predominantly sexual mode of transmission (A50-A64)

EXCLUDES 1: human immunodeficiency virus [HIV] disease (B20) nonspecific and nongonococcal urethritis (N34.1) Reiter’s disease (M02.3-)

AHA: 2021,2Q,6

 

A50 Congenital syphilis

 

A50.0 Early congenital syphilis, symptomatic

Any congenital syphilitic condition specified as early or manifest less than two years after birth.

A50.01 Early congenital syphilitic oculopathy

A50.02 Early congenital syphilitic osteochondropathy

A50.03 Early congenital syphilitic pharyngitis

Early congenital syphilitic laryngitis

A50.04 Early congenital syphilitic pneumonia

A50.05 Early congenital syphilitic rhinitis

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