ICD-10-CM · FY 2026 APRIL UPDATE
L66
Cicatricial alopecia [scarring hair loss]
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| L66.0 | Pseudopelade | Billable |
| L66.1 | Lichen planopilaris | Category |
| L66.10 | Lichen planopilaris, unspecified | Billable |
| L66.11 | Classic lichen planopilaris | Billable |
| L66.12 | Frontal fibrosing alopecia | Billable |
| L66.19 | Other lichen planopilaris | Billable |
| L66.2 | Folliculitis decalvans | Billable |
| L66.3 | Perifolliculitis capitis abscedens | Billable |
| L66.4 | Folliculitis ulerythematosa reticulata | Billable |
| L66.8 | Other cicatricial alopecia | Category |
| L66.81 | Central centrifugal cicatricial alopecia | Billable |
| L66.89 | Other cicatricial alopecia | Billable |
| L66.9 | Cicatricial alopecia, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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