Other lichen planus

This code represents various atypical presentations of lichen planus that do not fit into more specific categories. These can include less common morphological variants or locations of the inflammatory skin condition, such as hypertrophic, atrophic, or follicular lichen planus, or those affecting specific mucosal sites not otherwise specified. It signifies a diagnosis of lichen planus when the clinical features deviate from the classic presentation of violaceous, polygonal, pruritic papules.

Use this code when the physician's documentation clearly identifies a diagnosis of lichen planus, but specifies a variant or location that is not covered by more precise ICD-10-CM codes for lichen planus (e.g., oral, plantar, nail, or unspecified). This code is appropriate for conditions like lichen planopilaris, lichen planus pigmentosus, or lichen planus actinicus, provided no more specific code exists. Documentation should explicitly state "other lichen planus" or a specific variant that maps to this "other" category.

• Ensure documentation specifies the type of lichen planus if it's not the classic presentation, to justify using an "other" code.
• Distinguish from unspecified lichen planus (L43.9); this code requires a more specific, albeit "other," diagnosis.
• Consider sequencing if another condition is the primary reason for the encounter, and the lichen planus is a co-morbidity.