Classic lichen planopilaris

This code represents a chronic inflammatory scalp disorder characterized by perifollicular erythema, scaling, and progressive scarring alopecia. It is a variant of lichen planus that specifically affects hair follicles, leading to permanent hair loss. The condition typically presents with follicular papules and plaques, often accompanied by pruritus or burning sensations.

Use this code when the physician's documentation clearly identifies the patient's condition as classic lichen planopilaris. This diagnosis is typically made based on clinical presentation and confirmed by scalp biopsy showing characteristic histopathological features such as perifollicular lymphocytic infiltrate and follicular destruction. It is appropriate for initial diagnosis and subsequent encounters for management of this specific form of scarring alopecia.

• Ensure the documentation specifies "classic" lichen planopilaris to differentiate it from other variants or non-scarring alopecias.
• Do not confuse this with other forms of lichen planus (e.g., cutaneous, oral) that do not primarily affect hair follicles.
• Consider co-reporting codes for associated symptoms like pruritus (L29.x) if documented and treated.