1F28.1

ICD-11 MMS 2026-01

Dermatophytosis of nail

Description

Fungal infection of the nail plate due to dermatophyte fungi (tinea unguium). Infection results in a range of clinical signs including white or yellow discolouration, detachment of the plate from the nail bed (onycholysis), keratinous thickening under the nail plate (subungual hyperkeratosis) and fragility and fragmentation of the abnormal nail plate.

Index terms

  • Dermatophytosis of nail
  • Onychomycosis due to dermatophyte
  • Ringworm of nails
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  • Tinea of nail
  • Tinea unguium
  • Dermatophytosis of fingernail
  • Onychomycosis of fingernail due to dermatophyte
  • Tinea of fingernail
  • Tinea unguium of fingers
  • Dermatophytosis of toenail
  • Onychomycosis of toenail due to dermatophyte
  • Tinea of toenail
  • Tinea unguium of toes

Inclusions

  • Onychomycosis due to dermatophyte
  • Ringworm of nails
  • Tinea unguium

Excludes

  • 1F23.13 – Candida onychomycosis
  • 1F2D.5 – Onychomycosis due to non-dermatophyte mould

Exclusions from above levels

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  • CA70 – Hypersensitivity pneumonitis due to organic dust
  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1F28.0 – Dermatophytosis of scalp
  • 1F28.2 – Dermatophytosis of foot
  • 1F28.3 – Genitocrural dermatophytosis
  • 1F28.4 – Kerion
  • 1F28.5 – Disseminated dermatophytosis
  • 1F28.Y – Other specified dermatophytosis
  • 1F28.Z – Dermatophytosis, unspecified

Foundation entity

Dermatophytosis of nail – http://id.who.int/icd/entity/1731433055

Allowed postcoordination axes

Part of: 1F28: Dermatophytosis › 01: Certain infectious or parasitic diseases