2026 ICD-10-CM Diagnosis Code B48.8Other specified mycoses

ICD-10-CM Codes›A00–B99›B35-B49›B48

ICD-10-CM B48.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B48.8 is a billable ICD-10-CM diagnosis code for other specified mycoses. 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, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.

Code Identity

ICD-10-CM Code
B48.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified mycoses
Short Description
Other specified mycoses
Same as the full description in the CMS dataset.
Parent Code
B48
Other mycoses, not elsewhere classified

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB48Other mycoses, not elsewhere classified
This CodeB48.8Other specified mycoses

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adiaspiromycosis
  • Adiaspiromycosis caused by Emmonsia crescens
  • Adiaspiromycosis caused by Emmonsia parva
  • Dactylariosis
  • Deep mycosis
  • Disseminated hyalohyphomycosis
  • Disseminated infection caused by Chrysosporium
  • Disseminated phaeohyphomycosis
  • Fungal keratitis
  • Fusarium infection
  • Infection by Bipolaris hawaiiense
  • Infection by Fusarium sporotrichiella
  • Infection by Oomycetes
  • Infection by Oomycota
  • Infection by Paecilomyces variotii
  • Infection by Pythium
  • Infection by Scedosporium boydii
  • Infection caused by Chrysosporium
  • Infection caused by Magnusiomyces capitatus
  • Infection caused by Pseudallescheria
  • Infection caused by Rhodotorula
  • Infection caused by Saprochaete
  • Infection caused by Scytalidium
  • Infection of brain caused by Form Dematiaceae
  • Mycetoma caused by Fusarium
  • Mycotic keratitis caused by Fusarium
  • Mycotic keratitis caused by Fusarium oxysporum
  • Mycotic keratitis caused by Fusarium solani
  • Neonatal sepsis caused by Malassezia
  • Opportunistic infectious disease
  • Opportunistic mycosis
  • Otomycosis externa caused by Fusarium
  • Paecilomycosis
  • Phaeohyphomycosis
  • Rhodotorula glutinis or Rhodotorula mucilaginosa
  • Scedosporiosis
  • Sepsis caused by fungus
  • Trichosporonosis
  • Verrucous mycosis

Tabular List NotesGuidance

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

Inclusion Terms

  • Adiaspiromycosis
  • Infection of tissue and organs by Alternaria
  • Infection of tissue and organs by Drechslera
  • Infection of tissue and organs by Fusarium
  • Infection of tissue and organs by saprophytic fungi NEC

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.

    • Adiaspiromycosis
    • Hemisporosis
    • Infection, infected, infective(opportunistic)
      • Alternaria
    • Infection, infected, infective(opportunistic)
      • fungus NOS
        • pathogenic to compromised host only
    • Infection, infected, infective(opportunistic)
      • Fusarium
    • Infection, infected, infective(opportunistic)
      • mycotic NOS
        • pathogenic to compromised host only
    • Mycosis, mycotic
      • opportunistic
    • Mycosis, mycotic
      • specified NEC

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

  • Trichosporonosis

    fungal infections caused by trichosporon that may become systemic especially in an immunocompromised host. clinical manifestations range from superficial cutaneous infections to systemic lesions in multiple organs.

  • Cerebral Phaeohyphomycosis

    cns infections caused by neurotropic dematiaceous fungi that contain melanin in their cell walls. the infections often result in brain abscess; encephalitis; and meningitis in patients who are often immunocompetent. the common causative fungi include members cladophialophora bantiana, exophiala dermatitidis, rhinocladiella mackenziei, and ochroconis gallopavum. r. mackenziei infection is seen almost exclusively in patients from the middle east.

  • Phaeohyphomycosis

    opportunistic infections caused by the dematiaceous (darkly pigmented) mitosporic fungi of alternaria, bipolaris, cladosporium, curvularia, and exophiala. these fungi have pigmented hyphae due to melanin in the cell wall. the initial subcutaneous cyst from the infection can become systemic and spread rapidly to renal, pulmonary and cerebral systems (see cerebral phaeohyphomycosis) in an immunocompromised host.

  • Fungal Keratitis

    keratitis caused by fungi.

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 B48.8 to ICD-9-CMHistory

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

ICD-9-CM
117.8 Dematiacious fungi inf
Approximate The match is approximate rather than exact.
ICD-9-CM
118 Opportunistic mycoses
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 B48.8Overview

Is B48.8 (Other mycoses, not elsewhere classified) a billable code?

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

What MS-DRG does B48.8 group to?

When other specified mycoses is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, 974, 975, 976, with relative weights from 0.7297 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B48.8?

Under the General Equivalence Mappings, other specified mycoses converts to ICD-9-CM 117.8 (dematiacious fungi inf) and 118 (opportunistic mycoses). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.