B39
Histoplasmosis
B39 is a non-billable ICD-10-CM code category for histoplasmosis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are B39.0 Acute pulmonary histoplasmosis capsulati; B39.1 Chronic pulmonary histoplasmosis capsulati; B39.2 Pulmonary histoplasmosis capsulati, unspecified; B39.3 Disseminated histoplasmosis capsulati and 3 more. Its coding notes include a Code first instruction, a Use additional code instruction and 7 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
- associated AIDS (B20)
Use additional code
Add the listed code as a secondary code, if known.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (7 notes)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- 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)
Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible
More specific codes under B39 7
- B39.0Acute pulmonary histoplasmosis capsulatiBillable
- B39.1Chronic pulmonary histoplasmosis capsulatiBillable
- B39.2Pulmonary histoplasmosis capsulati, unspecifiedBillable
- B39.3Disseminated histoplasmosis capsulatiBillable
- B39.4Histoplasmosis capsulati, unspecifiedBillable
- B39.5Histoplasmosis duboisiiBillable
- B39.9Histoplasmosis, unspecifiedBillable