9A01.21

ICD-11 MMS 2026-01

Hordeolum internum

Description

A focal acute pyogenic infection, usually by Staphylococcus aureus, of a meibomian gland, the normal secretion from which into the eyelash follicle is blocked. It presents as an acute inflammatory swelling which may discharge onto the conjunctival surface of the eyelid, or rarely anteriorly through the eyelid skin. It may predispose to formation of a chalazion.

Index terms

  • Hordeolum internum
  • Acute meibomitis
  • Internal hordeolum
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  • Meibomian gland abscess
  • Hordeolum internum upper eyelid
  • Hordeolum internum lower eyelid

Excludes

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

Foundation entity

Hordeolum internum – http://id.who.int/icd/entity/1804498477

Allowed postcoordination axes

Part of: 9A01.2: Hordeolum › 9A01: Infectious disorders of eyelid › 09: Diseases of the visual system