ICD-10-CM 2027 diagnosis code

B39Histoplasmosis

Not billable — use a more specific code

B39 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B39

B39 is the ICD-10-CM diagnosis code for histoplasmosis. It belongs to block B35-B49 (mycoses) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B39.0 (capsulati), B39.1 (capsulati), B39.2 (unspecified), B39.3 (capsulati), B39.4 (capsulati, unspecified), B39.5 (duboisii) and B39.9 (unspecified).

Code first: associated AIDS (B20).

Use an additional code for any associated manifestations, such as: endocarditis (I39), meningitis (G02), pericarditis (I32) and retinitis (H32).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B39

Coding notes

Code firstSequence the underlying condition first

associated AIDS (B20)

Use additional codeAdd a secondary code to fully describe the condition

code for any associated manifestations, such as:
endocarditis (I39)
meningitis (G02)
pericarditis (I32)
retinitis (H32)

Notes that apply from higher levels

Instructions written at a parent level also apply to B39.

Broader instructions also apply from B35-B49 Mycoses and Chapter 1: Certain infectious and parasitic diseases.

Codes whose notes reference B39

H32Code first

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B39

Is B39 billable?: No. B39 is a header code. Report one of its more specific subcodes instead.