EA91.5ICD-11 MMS 2026-01
Lichen planus of the nails
Description
Lichen planus of the nail most commonly presents as nail plate thinning with longitudinal grooving and ridging. Hyperpigmentation, subungual hyperkeratosis, onycholysis, and longitudinal melanonychia can also occur. Rarely, the matrix can be permanently destroyed with prominent pterygium formation. Lichen planus has been linked to childhood idiopathic nail atrophy and may overlap with twenty-nail dystrophy of childhood.
Index terms
- Lichen planus of the nails
Exclusions from above levels
1B72.0– Bullous impetigo of the napkin area1F23.12– Napkin candidosisEH71– Dermatoses precipitated by drug therapy
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EH76– Dermatoses associated with specific classes of medication
Sibling codes
EA91.0– Acute eruptive lichen planusEA91.1– Hypertrophic lichen planusEA91.2– Follicular lichen planusEA91.3– Lichen planus of genital skin and mucous membranesEA91.4– Lichen planus and lichenoid reactions of oral mucosaEA91.6– Subacute lichen planusEA91.Y– Other specified lichen planusEA91.Z– Lichen planus of unspecified type
Foundation entity
Lichen planus of the nails – http://id.who.int/icd/entity/2032142067