ICD-10-CM · Chapter 12 · L00-L99
L66 Cicatricial alopecia [scarring hair loss]
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| L66..0 | Pseudopelade | Yes |
| L66..1 | Lichen planopilaris | No |
| L66..10 | Lichen planopilaris, unspecified | Yes |
| L66..11 | Classic lichen planopilaris | Yes |
| L66..12 | Frontal fibrosing alopecia | Yes |
| L66..19 | Other lichen planopilaris | Yes |
| L66..2 | Folliculitis decalvans | Yes |
| L66..3 | Perifolliculitis capitis abscedens | Yes |
| L66..4 | Folliculitis ulerythematosa reticulata | Yes |
| L66..8 | Other cicatricial alopecia | No |
| L66..81 | Central centrifugal cicatricial alopecia | Yes |
| L66..89 | Other cicatricial alopecia | Yes |
| L66..9 | Cicatricial alopecia, unspecified | Yes |
Last reviewed: September 2026