ICD-10 Code B39.9

Histoplasmosis, unspecified

Version 2019 Billable Code
ICD-10: B39.9
Short Description:Histoplasmosis, unspecified
Long Description:Histoplasmosis, unspecified

Valid for Submission

ICD-10 B39.9 is a billable code used to specify a medical diagnosis of histoplasmosis, unspecified. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Code Classification

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code B39.9 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.


Convert B39.9 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 115.90 - Histoplasmosis NOS (Approximate Flag)


The following clinical terms are approximate synonyms:

  • Classical histoplasmosis mediastinal fibrosis
  • Cutaneous histoplasmosis
  • Fungal cardiovascular infection
  • Fungal meningitis
  • Gingivitis due to Histoplasma
  • Histo spot
  • Histoplasma infection of central nervous system
  • Histoplasma infection of central nervous system
  • Histoplasma infection of central nervous system
  • Histoplasma infection of central nervous system
  • Histoplasmosis
  • Histoplasmosis associated with AIDS
  • Histoplasmosis of spinal cord
  • Histoplasmosis of spinal cord
  • Histoplasmosis syndrome of bilateral eyes
  • Histoplasmosis syndrome of left eye
  • Histoplasmosis syndrome of right eye
  • Histoplasmosis with pericarditis
  • Histoplasmosis with retinitis
  • Intramedullary abscess of spinal cord due to Histoplasma
  • Meningitis caused by Histoplasmosis
  • Ocular histoplasmosis syndrome
  • Primary cutaneous histoplasmosis
  • Spinal cord abscess
  • Subretinal neovascularization of left eye
  • Subretinal neovascularization of right eye

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code B39.9 are found in the index:

Information for Patients


Histoplasmosis is a disease caused by a fungus (or mold) called Histoplasma. The fungus is common in the eastern and central United States. It grows in soil and material contaminated with bat or bird droppings. You get infected by breathing the fungal spores. You cannot get the infection from someone else.

Histoplasmosis is often mild, with no symptoms. If you do get sick, it usually affects your lungs. Symptoms include feeling ill, fever, chest pains, and a dry cough. In severe cases, histoplasmosis spreads to other organs. This is called disseminated disease. It is more common in infants, young children, seniors, and people with immune system problems.

Your doctor might do a variety of tests to make the diagnosis, including a chest x-ray, CT scan of the lungs, or examining blood, urine, or tissues for signs of the fungus. Mild cases usually get better without treatment. Treatment of severe or chronic cases is with antifungal drugs.

Centers for Disease Control and Prevention

  • Histoplasma complement fixation (Medical Encyclopedia)
  • Histoplasma skin test (Medical Encyclopedia)
  • Histoplasmosis (Medical Encyclopedia)
  • Histoplasmosis - acute (primary) pulmonary (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.