L66.9 is the ICD-10 code for Cicatricial alopecia, unspecified. It is a four-character subcategory of L66 (Cicatricial alopecia [scarring hair loss]), the most specific level in the WHO edition. It belongs to the block L60–L75 (Disorders of skin appendages) in Chapter XII, Diseases of the skin and subcutaneous tissue.
- Code type
- Subcategory (4 characters)
- Chapter
- XII · L00–L99
- Classification
- WHO ICD-10, 2019 version
L66.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
L66.9Uspesifisert alopesi med arrdannelse
DL669Alopeci med ardannelse UNS
L66.9Määrittämätön arpikaljuus
L66.9Narbige Alopezie, nicht näher bezeichnet
L66.9Alopécie cicatricielle, sans précision
L66.9alopecia cicatricans, niet-gespecificeerd
L66.9Cicatricial alopecia, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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