ICD-10-CM 2027
ICD-10 code for areata alopecia
From the official ICD-10-CM alphabetic index entry “Alopecia (hereditaria) (seborrheica) › areata”. Page updated September 29, 2026.
About coding areata alopecia
The ICD-10-CM code for areata alopecia is L63.9 (Alopecia areata, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L63.9.
Within L63, choose L63.9 (unspecified) only when documentation doesn't support a more specific option: alopecia (capitis) totalis (L63.0), alopecia universalis (L63.1), Ophiasis (L63.2) and other alopecia areata (L63.8).
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 areata alopecia codes (official index)
Common questions about areata alopecia ICD-10 codes
What is the ICD-10 code for areata alopecia?
- L63.9 — Alopecia areata, unspecified. More specific codes apply when the documentation supports them: L63.2, L63.8, L63.0, L63.1.
What is the ICD-10 code for ophiasis areata alopecia?
- L63.2 — Ophiasis.
What is the ICD-10 code for totalis areata alopecia?
- L63.0 — Alopecia (capitis) totalis.
What is the ICD-10 code for universalis areata alopecia?
- L63.1 — Alopecia universalis.
Is L63.9 billable?
- Yes. L63.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L63.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L63.9 as a principal diagnosis.
Is L63.9 a CC or MCC?
- No. L63.9 is neither a CC nor an MCC under MS-DRG v44.0.