ICD-10-CM 2027
ICD-10 code for Ringworm
From the official ICD-10-CM alphabetic index entry “Ringworm”. Page updated September 29, 2026.
About coding Ringworm
The ICD-10-CM code for Ringworm is B35.9 (Dermatophytosis, unspecified). The official index lists 14 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B35.9.
Within B35, choose B35.9 (unspecified) only when documentation doesn't support a more specific option: tinea barbae and tinea capitis (B35.0), tinea unguium (B35.1), tinea manuum (B35.2), tinea pedis (B35.3), tinea corporis (B35.4), tinea imbricata (B35.5), tinea cruris (B35.6) and other dermatophytoses (B35.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Ringworm codes (official index)
- beard B35.0 — Tinea barbae and tinea capitis
- black dot B35.0 — Tinea barbae and tinea capitis
- body B35.4 — Tinea corporis
- Burmese B35.5 — Tinea imbricata
- corporeal B35.4 — Tinea corporis
- foot B35.3 — Tinea pedis
- groin B35.6 — Tinea cruris
- hand B35.2 — Tinea manuum
- honeycomb B35.0 — Tinea barbae and tinea capitis
- nails B35.1 — Tinea unguium
- perianal (area) B35.6 — Tinea cruris
- scalp B35.0 — Tinea barbae and tinea capitis
- specified NEC B35.8 — Other dermatophytoses
- Tokelau B35.5 — Tinea imbricata
Common questions about Ringworm ICD-10 codes
What is the ICD-10 code for Ringworm?
- B35.9 — Dermatophytosis, unspecified. More specific codes apply when the documentation supports them: B35.0, B35.0, B35.4, B35.5 and others below.
What is the ICD-10 code for beard ringworm?
- B35.0 — Tinea barbae and tinea capitis.
What is the ICD-10 code for black dot ringworm?
- B35.0 — Tinea barbae and tinea capitis.
What is the ICD-10 code for body ringworm?
- B35.4 — Tinea corporis.
What is the ICD-10 code for burmese ringworm?
- B35.5 — Tinea imbricata.
What is the ICD-10 code for corporeal ringworm?
- B35.4 — Tinea corporis.
What is the ICD-10 code for foot ringworm?
- B35.3 — Tinea pedis.
Is B35.9 billable?
- Yes. B35.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B35.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B35.9 as a principal diagnosis.
Is B35.9 a CC or MCC?
- No. B35.9 is neither a CC nor an MCC under MS-DRG v44.0.