2026 ICD-10-CM Diagnosis Code B39Histoplasmosis

ICD-10-CM Codes›A00–B99›B35-B49›B39

ICD-10-CM B39
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B39 is a non-billable ICD-10-CM category code for histoplasmosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B39.0, B39.1, B39.2, and B39.3.

Code Identity

ICD-10-CM Code
B39
Billable Status
No — Non-Billable Category
Code Describes
Histoplasmosis
Chapter
B35-B49
Mycoses

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB39Histoplasmosis
This CodeB39Histoplasmosis

Specific Coding for HistoplasmosisOverview

Non-specific codes like B39 require more characters. Use one of these billable codes instead:

  • Use B39.0 for Acute pulmonary histoplasmosis capsulati

  • Use B39.1 for Chronic pulmonary histoplasmosis capsulati

  • Use B39.2 for Pulmonary histoplasmosis capsulati, unspecified

  • Use B39.3 for Disseminated histoplasmosis capsulati

  • Use B39.4 for Histoplasmosis capsulati, unspecified

  • Use B39.5 for Histoplasmosis duboisii

  • Use B39.9 for Histoplasmosis, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code First

  • associated AIDS B20

Use Additional Code

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

Clinical InformationClinical

  • Histoplasmosis

    infection resulting from exposure to the fungus histoplasma.

  • Histoplasma

    a mitosporic onygenales fungal genus causing histoplasmosis in humans and animals. its single species is histoplasma capsulatum which has two varieties: h. capsulatum var. capsulatum and h. capsulatum var. duboisii. its teleomorph is ajellomyces capsulatus.

  • Histoplasmosis

    a disease caused by the fungus histoplasma capsulatum. it primarily affects the lungs but can also occur as a disseminated disease that affects additional organs. the acute respiratory disease has symptoms similar to those of a cold or flu and it usually resolves without treatment in healthy individuals. the disseminated form is generally fatal if untreated.

Patient EducationClinical

Histoplasmosis

Histoplasmosis is an infection caused by a fungus called Histoplasma. This fungus is common in the central and eastern United States, especially around the Ohio and Mississippi River valleys. It can also be found in parts of Central and South America, Africa, Asia, and Australia.

The full article covers:

  • What is histoplasmosis?
  • How do you get histoplasmosis?
  • What are the symptoms of histoplasmosis?
  • How is histoplasmosis diagnosed?
  • What are the treatments for histoplasmosis?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B39Overview

Is B39 (Histoplasmosis) a billable code?

No. This is a category header that groups the codes for histoplasmosis, and headers cannot be submitted on claims. Claims for histoplasmosis need a more specific code from this category, such as B39.0, B39.1, and B39.2.