9A78.50

ICD-11 MMS 2026-01

Keratoconus

Description

Keratoconus is a noninflammatory, often bilateral, corneal dystrophy characterised by progressive cone-shaped bulging and thinning of the cornea.

Index terms

  • Keratoconus
  • acquired conus of cornea
  • cornea conical
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  • Keratoconus, stable
  • Keratoconus, unstable
  • Keratoconus in Down syndrome

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • 8A21.0 – Posterior cortical atrophy

Sibling codes

  • 9A78.51 – Corneal staphyloma
  • 9A78.5Y – Other specified corneal deformities
  • 9A78.5Z – Corneal deformities, unspecified

Foundation entity

Keratoconus – http://id.who.int/icd/entity/945228622

Allowed postcoordination axes

Part of: 9A78.5: Corneal deformities › 9A78: Certain specified disorders of cornea › 09: Diseases of the visual system