Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.
Excludes1 (never code together)
candidial pneumonia (B37.1)
chlamydial pneumonia (J16.0)
gonorrheal pneumonia (A54.84)
histoplasmosis pneumonia (B39.0-B39.2)
measles pneumonia (B05.2)
nocardiosis pneumonia (A43.0)
pneumocystosis (B59)
pneumonia due to Pneumocystis carinii (B59)
pneumonia due to Pneumocystis jirovecii (B59)
pneumonia in actinomycosis (A42.0)
pneumonia in anthrax (A22.1)
pneumonia in ascariasis (B77.81)
pneumonia in aspergillosis (B44.0-B44.1)
pneumonia in coccidioidomycosis (B38.0-B38.2)
pneumonia in cytomegalovirus disease (B25.0)
pneumonia in toxoplasmosis (B58.3)
rubella pneumonia (B06.81)
salmonella pneumonia (A02.22)
spirochetal infection NEC with pneumonia (A69.8)
tularemia pneumonia (A21.2)
typhoid fever with pneumonia (A01.03)
varicella pneumonia (B01.2)
whooping cough with pneumonia (A37 with fifth-character 1)
Code first
underlying disease, such as:
Q fever (A78)
rheumatic fever (I00)
schistosomiasis (B65.0-B65.9)
Code also
, if applicable, any associated condition such as:
abscess (J85.1)
aspiration pneumonia (J69.-)
Applies from J17 Pneumonia in diseases classified elsewhere
Excludes1 (never code together)
candidial pneumonia (B37.1)
chlamydial pneumonia (J16.0)
gonorrheal pneumonia (A54.84)
histoplasmosis pneumonia (B39.0-B39.2)
measles pneumonia (B05.2)
nocardiosis pneumonia (A43.0)
pneumocystosis (B59)
pneumonia due to Pneumocystis carinii (B59)
pneumonia due to Pneumocystis jirovecii (B59)
pneumonia in actinomycosis (A42.0)
pneumonia in anthrax (A22.1)
pneumonia in ascariasis (B77.81)
pneumonia in aspergillosis (B44.0-B44.1)
pneumonia in coccidioidomycosis (B38.0-B38.2)
pneumonia in cytomegalovirus disease (B25.0)
pneumonia in toxoplasmosis (B58.3)
rubella pneumonia (B06.81)
salmonella pneumonia (A02.22)
spirochetal infection NEC with pneumonia (A69.8)
tularemia pneumonia (A21.2)
typhoid fever with pneumonia (A01.03)
varicella pneumonia (B01.2)
whooping cough with pneumonia (A37 with fifth-character 1)
Code first
underlying disease, such as:
Q fever (A78)
rheumatic fever (I00)
schistosomiasis (B65.0-B65.9)
Code also
, if applicable, any associated condition such as:
abscess (J85.1)
aspiration pneumonia (J69.-)
MS-DRG index
Defines the logic of DRG(s) 177-179 in MDC 04.
Approximate ICD-9-CM (GEMs)
484.7 Pneumonia in other systemic mycoses (approximate)
484.8 Pneumonia in other infectious diseases classified elsewhere (approximate)
517.1 Rheumatic pneumonia (approximate)
Medicare Code Edits (MCE v43.1 (April 2026))
Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.
Code annotations containing back-references to J17
Use Additional: J95.89 Other postprocedural complications and disorders of respiratory system, not elsewhere classified ("bacterial or viral pneumonia (J12-J18)")
Use Additional: J95.89 Other postprocedural complications and disorders of respiratory system, not elsewhere classified ("bacterial or viral pneumonia (J12-J18)")