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  5. Pneumonia in diseases classified elsewhere (J17)

Pneumonia in diseases classified elsewhere (J17)

ICD-10 code J17 is used to classify cases of pneumonia that develop as a complication of other underlying diseases rather than as a primary lung infection. This includes pneumonia caused by uncommon infections or as part of systemic illnesses.

Pneumonia in diseases classified elsewhere (J17) covers conditions such as fungal pneumonia, pneumonia caused by parasitic infestations like Schistosoma mansoni or Schistosoma japonicum, and pneumonia related to immune disorders like lupus pneumonitis or rheumatic pneumonitis. These synonyms help clarify that this code is appropriate when pneumonia occurs in the context of these specific systemic conditions, distinguishing it from typical bacterial or viral pneumonias. For medical coders, the ICD-10 code for pneumonia in these special cases is J17, ensuring accurate documentation when pneumonia arises secondarily to another disease.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • underlying disease, such as:
  • Q fever A78
  • rheumatic fever I00
  • schistosomiasis B65.0 B65.9

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

  • , if applicable, any associated condition such as:
  • abscess J85.1
  • aspiration pneumonia J69

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • 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 jiroveci 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