9A21.1

ICD-11 MMS 2026-01

Orbital subperiosteal abscess

Description

A condition of the eye and adnexa, caused by an infection with a bacterial source. This condition is characterised by a focal accumulation of purulent material in the bones that support the globe, fever, crusting of the eye, swelling of the eye, or proptosis. Confirmation is by identification of the bacterial agent.

Index terms

  • Orbital subperiosteal abscess

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
Show allHide
  • 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

  • 9A21.0 – Orbital cellulitis
  • 9A21.2 – Orbital abscess
  • 9A21.3 – Periostitis of orbit
  • 9A21.Y – Other specified orbital infection
  • 9A21.Z – Orbital infection, unspecified

Foundation entity

Orbital subperiosteal abscess – http://id.who.int/icd/entity/1730588366

Allowed postcoordination axes

Part of: 9A21: Orbital infection › 09: Diseases of the visual system