Non-Billable / Non-Specific Code
ICD-10-CM L66 is the diagnosis code for Cicatricial alopecia [scarring hair loss]. This code falls under the section "Disorders of skin appendages" within Chapter 12 — Diseases of the skin and subcutaneous tissue (L00-L99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where L66 sits in the ICD-10-CM classification helps ensure proper coding:
No, L66 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
L66 is the ICD-10-CM diagnosis code for "Cicatricial alopecia [scarring hair loss]". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
L66 is located in Section L60-L75 — "Disorders of skin appendages" within Chapter 12 of the ICD-10-CM Tabular List.
L66 has 7 sub-code(s) that provide more specific detail: L66.0, L66.1, L66.2, L66.3, L66.4 and more.
Use L66 when the patients documented diagnosis matches "Cicatricial alopecia [scarring hair loss]" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Cicatricial alopecia [scarring hair loss] is L66.
No, L66 is non-billable. Use a more specific sub-code for primary diagnosis billing.
L66 is in Chapter 12 of the ICD-10-CM Tabular List.
Yes, L66 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.