2026 ICD-10-CM Diagnosis Code B41.9Paracoccidioidomycosis, unspecified

ICD-10-CM Codes›A00–B99›B35-B49›B41

ICD-10-CM B41.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B41.9 is a billable ICD-10-CM diagnosis code for paracoccidioidomycosis, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. Coders also document this condition as acute juvenile paracoccidioidomycosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.

Code Identity

ICD-10-CM Code
B41.9
Billable Status
Yes — Valid for Submission
Code Describes
Paracoccidioidomycosis, unspecified
Short Description
Paracoccidioidomycosis, unspecified
Same as the full description in the CMS dataset.
Parent Code
B41
Paracoccidioidomycosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB41Paracoccidioidomycosis
This CodeB41.9Paracoccidioidomycosis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute juvenile paracoccidioidomycosis
  • Hypoadrenalism due to paracoccidioidomycosis
  • Paracoccidioidomycosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Paracoccidioidomycosis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Paracoccidioidomycosis

    a mycosis affecting the skin, mucous membranes, lymph nodes, and internal organs. it is caused most often by paracoccidioides brasiliensis. it is also called paracoccidioidal granuloma.

  • Paracoccidioidomycosis

    a systemic fungal infection caused by paracoccidioides brasiliensis that is most often seen in immunocompromised patients. it affects the mucous membranes, lymph nodes, lungs and bones.

Patient EducationClinical

Fungal Infections

If you have ever had athlete's foot or a yeast infection, you can blame a fungus. A fungus is a primitive organism. Mushrooms, mold and mildew are examples. Fungi live in air, in soil, on plants and in water. Some live in the human body. Only about half of all types of fungi are harmful.

Read the full article at MedlinePlus

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

Convert B41.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
116.1 Paracoccidioidomycosis
Approximate The match is approximate rather than exact.

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 B41.9Overview

Is B41.9 (Paracoccidioidomycosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report paracoccidioidomycosis, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B41.9 group to?

When paracoccidioidomycosis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B41.9?

Under the General Equivalence Mappings, paracoccidioidomycosis, unspecified converts to ICD-9-CM 116.1 (paracoccidioidomycosis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.