B39.4 – Histoplasmosis capsulati, unspecified

ICD-10-CM 2027 diagnosis code · Mycoses

Billable code

ICD-10-CM code B39.4

Code: B39.4 (claims format: B394)
Description: Histoplasmosis capsulati, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: B35-B49 Mycoses
Parent codes: B39

Notes for B39.4

Applicable to:

American histoplasmosis

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

B39 – Histoplasmosis

Code first:

associated AIDS (B20)

Use additional code:

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

Block B35-B49

Excludes2 (not included here):

hypersensitivity pneumonitis due to organic dust (J67.-)
mycosis fungoides (C84.0-)

Index terms for B39.4

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in B39

B39.0 – Acute pulmonary histoplasmosis capsulatiBillable
B39.1 – Chronic pulmonary histoplasmosis capsulatiBillable
B39.2 – Pulmonary histoplasmosis capsulati, unspecifiedBillable
B39.3 – Disseminated histoplasmosis capsulatiBillable
B39.5 – Histoplasmosis duboisiiBillable
B39.9 – Histoplasmosis, unspecifiedBillable

Frequently asked questions

What is ICD-10 code B39.4?

B39.4 is the ICD-10-CM code for histoplasmosis capsulati, unspecified, in the block B35-B49 (Mycoses).

Is B39.4 a billable code?

Yes. B39.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does B39.4 belong to?

It belongs to category B39 – Histoplasmosis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.