ICD-10-CM 2027
ICD-10 code for Cornu cutaneum
From the official ICD-10-CM alphabetic index entry “Cornu cutaneum”. Page updated September 29, 2026.
About coding Cornu cutaneum
The ICD-10-CM code for Cornu cutaneum is L85.8 (Other specified epidermal thickening).
Within L85, choose L85.8 (Other specified epidermal thickening) only when documentation doesn't support a more specific option: acquired ichthyosis (L85.0), acquired keratosis [keratoderma] palmaris et plantaris (L85.1), keratosis punctata (palmaris et plantaris) (L85.2), xerosis cutis (L85.3) and epidermal thickening, unspecified (L85.9).
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.
Common questions about Cornu cutaneum ICD-10 codes
What is the ICD-10 code for Cornu cutaneum?
- L85.8 — Other specified epidermal thickening.
Is L85.8 billable?
- Yes. L85.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L85.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L85.8 as a principal diagnosis.
Is L85.8 a CC or MCC?
- No. L85.8 is neither a CC nor an MCC under MS-DRG v44.0.