ICD-10 Code for Histoplasmosis
The ICD-10-CM code for histoplasmosis is B39.9 — Histoplasmosis, unspecified. This is the code the Alphabetic Index gives for histoplasmosis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
B39.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which histoplasmosis code should you use?
The Alphabetic Index lists 7 codes under Histoplasmosis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| with pneumonia NEC | B39.2 | Pulmonary histoplasmosis capsulati, unspecified | |
| African | B39.5 | Histoplasmosis duboisii | |
| capsulati | B39.4 | Histoplasmosis capsulati, unspecified | |
| Darling's | B39.4 | Histoplasmosis capsulati, unspecified | |
| duboisii | B39.5 | Histoplasmosis duboisii | |
| lung NEC | B39.2 | Pulmonary histoplasmosis capsulati, unspecified |
Histoplasmosis capsulati
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources