ICD-10 Code L66.0 – Pseudopelade (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L66.0 – Pseudopelade
What it is
Pseudopelade is a form of scarring hair loss that causes permanent loss of follicles, usually on the scalp. Use this code when the record specifically identifies pseudopelade.
Clinical signs
Typical findings include smooth, shiny, atrophic patches of alopecia with little or no visible inflammation. Clinical features vary; refer to documentation.
When to use this code
Use L66.0 when the clinician documents pseudopelade, pseudopelade of Brocq, or an equivalent diagnosis of cicatricial alopecia. It may also apply when the note clearly distinguishes this condition from other scarring alopecias. If the documentation is nonspecific, check documentation.
Do not use for
Do not use this code for nonscarring hair loss, alopecia areata, or unspecified alopecia. If another scarring alopecia is documented, code that condition instead.
Coding tip
Confirm the exact alopecia type in the assessment, because pseudopelade is a specific scarring diagnosis and should not be coded from hair loss alone.