L91

ICD-10Non-billable category

Hypertrophic disorders of skin

Official ICD-10-CM descriptor (FY2026)

Hypertrophic disorders of skin

L91 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

More specific codes under L91

L91.0Hypertrophic scar
L91.8Other hypertrophic disorders of the skin
L91.9Hypertrophic disorder of the skin, unspecified

Where this code sits

Chapter: 12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block: Other disorders of the skin and subcutaneous tissue (L80-L99)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.