EA91.5

ICD-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 area
  • 1F23.12 – Napkin candidosis
  • EH71 – Dermatoses precipitated by drug therapy
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  • EH76 – Dermatoses associated with specific classes of medication

Sibling codes

  • EA91.0 – Acute eruptive lichen planus
  • EA91.1 – Hypertrophic lichen planus
  • EA91.2 – Follicular lichen planus
  • EA91.3 – Lichen planus of genital skin and mucous membranes
  • EA91.4 – Lichen planus and lichenoid reactions of oral mucosa
  • EA91.6 – Subacute lichen planus
  • EA91.Y – Other specified lichen planus
  • EA91.Z – Lichen planus of unspecified type

Foundation entity

Lichen planus of the nails – http://id.who.int/icd/entity/2032142067

Part of: EA91: Lichen planus › 14: Diseases of the skin