2026 ICD-10-CM Diagnosis Code B35.4Tinea corporis

ICD-10-CM Codes›A00–B99›B35-B49›B35

ICD-10-CM B35.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B35.4 is a billable ICD-10-CM diagnosis code for tinea corporis. 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
B35.4
Billable Status
Yes — Valid for Submission
Code Describes
Tinea corporis
Short Description
Tinea corporis
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 CodeB35.4Tinea corporis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Tinea caused by Epidermophyton floccosum
  • Tinea caused by Microsporum audouinii
  • Tinea caused by Microsporum canis variant canis
  • Tinea caused by Microsporum canis variant distortum
  • Tinea caused by Microsporum equinum
  • Tinea caused by Microsporum ferrugineum
  • Tinea caused by Microsporum nanum
  • Tinea caused by Nannizzia fulva
  • Tinea caused by Nannizzia gypsea
  • Tinea caused by Trichophyton equinum
  • Tinea caused by Trichophyton megninii
  • Tinea caused by Trichophyton mentagrophytes variant erinacei
  • Tinea caused by Trichophyton persicolor
  • Tinea caused by Trichophyton rubrum
  • Tinea caused by Trichophyton simii
  • Tinea caused by Trichophyton soudanense
  • Tinea caused by Trichophyton tonsurans
  • Tinea caused by Trichophyton verrucosum
  • Tinea caused by Trichophyton violaceum
  • Tinea caused by Trichophyton yaoundei
  • Tinea corporis
  • Tinea corporis caused by Epidermophyton floccosum
  • Tinea corporis caused by Microsporum
  • Tinea corporis caused by Microsporum audouinii
  • Tinea corporis caused by Microsporum canis variant canis
  • Tinea corporis caused by Microsporum distortum
  • Tinea corporis caused by Microsporum equinum
  • Tinea corporis caused by Microsporum ferrugineum
  • Tinea corporis caused by Microsporum nanum
  • Tinea corporis caused by Nannizzia fulva
  • Tinea corporis caused by Nannizzia gypsea
  • Tinea corporis caused by Trichophyton
  • Tinea corporis caused by Trichophyton equinum variant equinum
  • Tinea corporis caused by Trichophyton gallinae
  • Tinea corporis caused by Trichophyton megninii
  • Tinea corporis caused by Trichophyton mentagrophytes
  • Tinea corporis caused by Trichophyton mentagrophytes variant erinacei
  • Tinea corporis caused by Trichophyton persicolor
  • Tinea corporis caused by Trichophyton rubrum
  • Tinea corporis caused by Trichophyton schoenleinii
  • Tinea corporis caused by Trichophyton simii
  • Tinea corporis caused by Trichophyton soudanense
  • Tinea corporis caused by Trichophyton tonsurans variant tonsurans
  • Tinea corporis caused by Trichophyton verrucosum
  • Tinea corporis caused by Trichophyton violaceum
  • Tinea corporis caused by Trichophyton yaoundei

Tabular List NotesGuidance

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

Inclusion Terms

  • Ringworm of the body

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)
      • body
    • Dermatophytosis(epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton)
      • corporis
    • Herpes, herpesvirus, herpetic
      • circinatus
    • Ringworm
      • body
    • Ringworm
      • corporeal
    • Tinea(intersecta) (tarsi)
      • corporis

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.

  • Dermatophytosis

    a common fungal infection of the stratum corneum of the skin, hair, or nails by a dermatophyte. it is characterized by itching, inflammation, redness of the skin, small papular vesicles, central clearing, fissures, scaling, and/or hair loss in the affected area.

  • Dermatophytosis of Groin and Perianal Area

    dermatophytosis involving the stratum corneum of the skin of the groin and perianal area.

  • Dermatophytosis of Scalp and Beard

    dermatophytosis involving the stratum corneum of the skin of the scalp and beard area.

Patient EducationClinical

Tinea Infections

Tinea is the name of a group of diseases caused by a fungus. Types of tinea include ringworm, athlete's foot and jock itch. These infections are usually not serious, but they can be uncomfortable. You can get them by touching an infected person, from damp surfaces such as shower floors, or even from a pet.

Read the full article at MedlinePlus

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

Convert B35.4 to ICD-9-CMHistory

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

ICD-9-CM
110.5 Dermatophytosis of body
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 B35.4Overview

Is B35.4 (Dermatophytosis) a billable code?

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

What MS-DRG does B35.4 group to?

When tinea corporis 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 B35.4?

Under the General Equivalence Mappings, tinea corporis converts to ICD-9-CM 110.5 (dermatophytosis of body). 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.