2026 ICD-10-CM Diagnosis Code B35.8Other dermatophytoses

ICD-10-CM Codes›A00–B99›B35-B49›B35

ICD-10-CM B35.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B35.8 is a billable ICD-10-CM diagnosis code for other dermatophytoses. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.

Code Identity

ICD-10-CM Code
B35.8
Billable Status
Yes — Valid for Submission
Code Describes
Other dermatophytoses
Short Description
Other dermatophytoses
Same as the full description in the CMS dataset.
Parent Code
B35
Dermatophytosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB35Dermatophytosis
This CodeB35.8Other dermatophytoses

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Allergy-sensitivity to fungi syndrome
  • Deep seated dermatophytosis
  • Disseminated dermatophytosis
  • Epidermophytide
  • Granulomatous dermatophytosis
  • Id reaction
  • Majocchi granuloma
  • Microsporide
  • Tinea faciei
  • Tinea of perianal region
  • Trichophytide

Tabular List NotesGuidance

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

Inclusion Terms

  • Disseminated dermatophytosis
  • Granulomatous dermatophytosis

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.

    • Dermatophytosis(epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton)
      • deep-seated
    • Dermatophytosis(epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton)
      • disseminated
    • Dermatophytosis(epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton)
      • granulomatous
    • Dermatophytosis(epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton)
      • specified NEC
    • Granuloma
      • Majocchi's
    • Granuloma
      • trichophyticum
    • Majocchi's
      • granuloma
    • Ringworm
      • specified NEC
    • Tinea(intersecta) (tarsi)
      • 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

  • Deep Seated Dermatophytosis

    a deep folliculitis due to a cutaneous dermatophyte infection, usually on the legs. it is most commonly caused by trichophyton rubrum and is characterized by the formation of spongy granulomas which persist for three to four months and leaves deep scars.

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 B35.8 to ICD-9-CMHistory

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

ICD-9-CM
110.6 Deep dermatophytosis
Approximate The match is approximate rather than exact.
ICD-9-CM
110.8 Dermatophytosis site NEC
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 B35.8Overview

Is B35.8 (Dermatophytosis) a billable code?

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

What MS-DRG does B35.8 group to?

When other dermatophytoses is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B35.8?

Under the General Equivalence Mappings, other dermatophytoses converts to ICD-9-CM 110.6 (deep dermatophytosis) and 110.8 (dermatophytosis site NEC). 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.