Is L66 a billable code?
No. L66 is a header code that groups 11 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
L66: Cicatricial alopecia [scarring hair loss]
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
L66 groups related diagnoses under cicatricial alopecia [scarring hair loss]. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under L66
- L66.0Pseudopelade
- 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
- L66.81Central centrifugal cicatricial alopecia
- L66.89Other cicatricial alopecia
- L66.9Cicatricial alopecia, unspecified
L66 questions
What does L66 mean?
L66 is the ICD-10-CM code for Cicatricial alopecia [scarring hair loss]. It is in chapter 12, Diseases of the skin and subcutaneous tissue (L00-L99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.