2027 ICD-10-CM Diagnosis Code B39Histoplasmosis

ICD-10-CM Codes›A00–B99›B35-B49›B39

ICD-10-CM B39
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Histoplasmosis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B39: its own notes plus those printed at block B35-B49 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block B35-B49 Mycoses applies to 104 codes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Code First

The underlying condition named in the note is sequenced before this code.

  • associated AIDS (B20)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

On B39 itself
  • code for any associated manifestations, such as:
  • endocarditis (I39)
  • meningitis (G02)
  • pericarditis (I32)
  • retinitis (H32)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B39, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and B39 is one of the conditions named.

  • H32 Chorioretinal disorders in diseases classified elsewhere
    histoplasmosis (B39.-)

Clinical InformationClinical

  • Histoplasmosis

    infection resulting from exposure to the fungus histoplasma.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B39Overview

What is the ICD-10 code for histoplasmosis?

B39 is the ICD-10-CM category for histoplasmosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Does B39 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code for any associated manifestations, such as: endocarditis (I39); meningitis (G02); pericarditis (I32); retinitis (H32). The additional code is reported after B39.