ICD-10-CM · Chapter 12 · L00–L99
L66
Cicatricial alopecia [scarring hair loss]
Diseases of the skin and subcutaneous tissue
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- L66
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 12 — Diseases of the skin and subcutaneous tissue
- Category
- L66
- Specificity
- 3 characters
How coders use this code
ICD-10-CM L66 is a category (header) for cicatricial alopecia [scarring hair loss]. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in L66
- L66.0Pseudopelade
- L66.1Lichen planopilaris
- L66.10Lichen planopilaris, unspecified
- L66.11Classic lichen planopilaris
- L66.12Frontal fibrosing alopecia
- L66.19Other lichen planopilaris
- L66.2Folliculitis decalvans
- L66.3Perifolliculitis capitis abscedens
- L66.4Folliculitis ulerythematosa reticulata
- L66.8Other cicatricial alopecia
- L66.81Central centrifugal cicatricial alopecia
- L66.89Other cicatricial alopecia
- L66.9Cicatricial alopecia, unspecified
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