Is B39 a billable ICD-10-CM code?

No. B39 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B39 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).

B39

B39 — Histoplasmosis

Non-billable headerICD-10-CM

B39 is a non-billable header ICD-10-CM code for histoplasmosis. It cannot be billed on its own: choose one of the more specific child codes below.

Code first

The underlying condition must be sequenced before this code.

associated AIDS (B20)

Use additional code

Add a secondary code to capture the detail described below.

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

Other codes that can never be billed with B39

These codes carry an Excludes1 note pointing at B39. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B39 alone.

J17Pneumonia in diseases classified elsewhere
J99Respiratory disorders in diseases classified elsewhere

Risk adjustment

B39 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead B39

7 child codes. Green means billable.

Questions about B39

Is B39 a billable ICD-10-CM code?: No. B39 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B39 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).