ICD-10-CM 2027
ICD-10 code for pityriasis
From the official ICD-10-CM alphabetic index entry “Pityriasis (capitis)”. Page updated September 29, 2026.
About coding pityriasis
The ICD-10-CM code for pityriasis is L21.0 (Seborrhea capitis). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L21.0.
Within L21 (seborrheic dermatitis), L21.0 is specifically for Seborrhea capitis. Related codes cover seborrheic infantile dermatitis (L21.1), other seborrheic dermatitis (L21.8) and unspecified (L21.9).
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 pityriasis codes (official index)
- alba L30.5 — Pityriasis alba
- circinata (et maculata) L42 — Pityriasis rosea
- furfuracea L21.0 — Seborrhea capitis
- Hebra's L26 — Exfoliative dermatitis
- lichenoides L41.0 — Pityriasis lichenoides et varioliformis acuta
- chronica L41.1 — Pityriasis lichenoides chronica
- et varioliformis (acuta) L41.0 — Pityriasis lichenoides et varioliformis acuta
- maculata (et circinata) L30.5 — Pityriasis alba
- nigra B36.1 — Tinea nigra
- pilaris, Hebra's L44.0 — Pityriasis rubra pilaris
- rosea L42 — Pityriasis rosea
- rotunda L44.8 — Other specified papulosquamous disorders
- rubra (Hebra) pilaris L44.0 — Pityriasis rubra pilaris
- simplex L30.5 — Pityriasis alba
- specified type NEC L30.5 — Pityriasis alba
- streptogenes L30.5 — Pityriasis alba
- versicolor (scrotal) B36.0 — Pityriasis versicolor
Common questions about pityriasis ICD-10 codes
What is the ICD-10 code for pityriasis?
- L21.0 — Seborrhea capitis. More specific codes apply when the documentation supports them: L30.5, L42, L21.0, L26 and others below.
What is the ICD-10 code for alba pityriasis?
- L30.5 — Pityriasis alba.
What is the ICD-10 code for circinata pityriasis?
- L42 — Pityriasis rosea.
What is the ICD-10 code for furfuracea pityriasis?
- L21.0 — Seborrhea capitis.
What is the ICD-10 code for hebra's pityriasis?
- L26 — Exfoliative dermatitis.
What is the ICD-10 code for lichenoides pityriasis?
- L41.0 — Pityriasis lichenoides et varioliformis acuta.
What is the ICD-10 code for maculata pityriasis?
- L30.5 — Pityriasis alba.
Is L21.0 billable?
- Yes. L21.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L21.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L21.0 as a principal diagnosis.
Is L21.0 a CC or MCC?
- No. L21.0 is neither a CC nor an MCC under MS-DRG v44.0.