ICD-10 Code L67.0 – Trichorrhexis nodosa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L67.0 – Trichorrhexis nodosa
What it is
Trichorrhexis nodosa is a hair shaft disorder in which the hair becomes weak and breaks at nodes along the shaft. It usually reflects structural damage to the hair rather than a scalp disease.
Clinical signs
Look for brittle hair, easy breakage, and short fractured hairs. Clinical features vary; refer to documentation if the record does not clearly describe the characteristic nodular weakening of the hair shaft.
When to use this code
Use L67.0 when the provider documents trichorrhexis nodosa specifically, or describes classic hair-shaft fragility consistent with that diagnosis. Code it when the condition is the reason for evaluation or is clearly recorded in the assessment.
Do not infer the diagnosis from nonspecific hair loss alone. If the note only states damaged, dry, or broken hair without confirmation, check documentation before assigning this code.
Do not use for
Do not use this code for generalized alopecia, hair thinning, or cosmetic hair damage unless trichorrhexis nodosa is documented. Check documentation when the record suggests another hair disorder.
Coding tip
Confirm the exact hair-shaft diagnosis in the provider note before coding, because brittle hair alone is not enough for L67.0.