B39.5 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools

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Code lookupB39.5

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Mycoses (B35-B49)

B39.5

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Histoplasmosis duboisii

A fungal infection caused by Histoplasma duboisii, a less common variant of histoplasmosis primarily found in Africa and characterized by skin and bone involvement.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

B39Histoplasmosis B39.5Histoplasmosis duboisii

Inclusion Terms

Official

African histoplasmosis

Excludes 2

Official

carrier or suspected carrier of infectious disease (Z22.-)Inherited from A00-B99, B35-B49
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)Inherited from A00-B99, B35-B49
infectious and parasitic diseases specific to the perinatal period (P35-P39)Inherited from A00-B99, B35-B49
influenza and other acute respiratory infections (J00-J22)Inherited from A00-B99, B35-B49
hypersensitivity pneumonitis due to organic dust (J67.-)Inherited from A00-B99, B35-B49
mycosis fungoides (C84.0-)Inherited from A00-B99, B35-B49

Related Codes

Official

B39.0Acute pulmonary histoplasmosis capsulati B39.1Chronic pulmonary histoplasmosis capsulati B39.2Pulmonary histoplasmosis capsulati, unspecified B39.3Disseminated histoplasmosis capsulati B39.4Histoplasmosis capsulati, unspecified

Includes

Official

diseases generally recognized as communicable or transmissibleInherited from A00-B99

Excludes 1

Official

certain localized infections - see body system-related chaptersInherited from A00-B99

Code First

Official

associated AIDS (B20)Inherited from B39

Use Additional

Official

code to identify resistance to antimicrobial drugs (Z16.-)Inherited from A00-B99, B39
code for any associated manifestations, such as:Inherited from A00-B99, B39
endocarditis (I39)Inherited from A00-B99, B39
meningitis (G02)Inherited from A00-B99, B39
pericarditis (I32)Inherited from A00-B99, B39
retinitis (H32)Inherited from A00-B99, B39

Code Also

Official

No Code Also instructions are included in this display for B39.5. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

This variant is geographically distinct; confirm patient exposure history in African regions

H. duboisii typically presents with cutaneous and osseous manifestations rather than pulmonary disease

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is B39.5 an HCC code?

No. B39.5 is a billable ICD-10-CM code with no mapping under the current CMS-HCC V28 community payment model, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: B39.5
Description: Histoplasmosis duboisii
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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What This Code Means

B39.5 is the ICD-10-CM diagnosis code for histoplasmosis duboisii. A fungal infection caused by Histoplasma duboisii, a less common variant of histoplasmosis primarily found in Africa and characterized by skin and bone involvement. B39.5 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering mycoses (b35-b49).

B39.5 is a billable ICD-10-CM code, but no current CMS-HCC V28 community payment mapping is shown, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

This variant is geographically distinct; confirm patient exposure history in African regions.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for B39.5 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This variant is geographically distinct; confirm patient exposure history in African regions
•H. duboisii typically presents with cutaneous and osseous manifestations rather than pulmonary disease