9A02.0

ICD-11 MMS 2026-01

Chalazion

Description

A chalazion is a small cyst on the eyelid caused by blockage of a meibomian gland.

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

Child codes

Sibling codes

  • 9A02.1 – Posterior blepharitis
  • 9A02.2 – Ligneous conjunctivitis
  • 9A02.4 – Meibomian gland dysfunction
  • 9A02.Y – Other specified inflammatory disorders of eyelid
  • 9A02.Z – Inflammatory disorders of eyelid, unspecified

Foundation entity

Chalazion – http://id.who.int/icd/entity/777918741

Allowed postcoordination axes

Part of: 9A02: Inflammatory disorders of eyelid › 09: Diseases of the visual system