ICD-10-CM > L00-L99 > L40-L45 > L43 L43 Lichen planus Non-Billable/Non-Specific Type 1 Excludes lichen planopilaris (L66.1-) Codes L43.0Hypertrophic lichen planusL43.1Bullous lichen planusL43.2Lichenoid drug reactionL43.3Subacute (active) lichen planusL43.8Other lichen planusL43.9Lichen planus, unspecified