L66.10 – Lichen planopilaris, unspecified
ICD-10-CM 2027 diagnosis code · Disorders of skin appendages
ICD-10-CM code
L66.10
- Code
L66.10(claims format:L6610)- Description
- Lichen planopilaris, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 12. Diseases of the skin and subcutaneous tissue (L00-L99)
- Block
- L60-L75 Disorders of skin appendages
- Parent codes
- L66 › L66.1
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block L60-L75
Excludes1 (not coded here):
- congenital malformations of integument (Q84.-)
Index terms for L66.10
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in L66.1
Frequently asked questions
What is ICD-10 code L66.10?
L66.10 is the ICD-10-CM code for lichen planopilaris, unspecified, in the block L60-L75 (Disorders of skin appendages).
Is L66.10 a billable code?
Yes. L66.10 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does L66.10 belong to?
It belongs to category L66 – Cicatricial alopecia [scarring hair loss].
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.