Lichen planus

This code identifies lichen planus, a chronic inflammatory condition affecting the skin, hair, nails, and mucous membranes. It is characterized by pruritic, polygonal, purple, planar papules and plaques, often with fine white lines (Wickham's striae).

Assign this code for documented diagnoses of lichen planus, regardless of the affected body site. This includes oral lichen planus, cutaneous lichen planus, and nail lichen planus. Documentation should clearly state the diagnosis of lichen planus by a physician.

• Do not confuse with psoriasis or eczema, which have distinct ICD-9-CM codes.
• Specificity regarding the affected body site is not required for this general code.
• Review documentation for any associated conditions or complications that may require additional coding.