9D42.6

ICD-11 MMS 2026-01

Homonymous hemianopia or quadrant anopia

Description

Homonymous, binocular field defects present the same or similar patterns in both eyes. They are caused by lesions of the retro-chiasmal pathways.

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

  • 9D42.60 – Right hemi-field homonymous hemianopia or quadrant anopia
  • 9D42.61 – Left hemi-field homonymous hemianopia or quadrant anopia
  • 9D42.6Y – Other specified homonymous hemianopia or quadrant anopia
  • 9D42.6Z – Homonymous hemianopia or quadrant anopia, unspecified

Sibling codes

  • 9D42.2 – Peripheral field deficit
  • 9D42.3 – Hemianopic or quadrantic loss
  • 9D42.4 – Central scotoma
  • 9D42.5 – Para-central scotoma
  • 9D42.7 – Heteronymous hemianopia or quadrant anopia
  • 9D42.Y – Other specified patterns of visual field impairment
  • 9D42.Z – Patterns of visual field impairment, unspecified

Foundation entity

Homonymous hemianopia or quadrant anopia – http://id.who.int/icd/entity/148566589

Allowed postcoordination axes

Part of: 9D42: Patterns of visual field impairment › 09: Diseases of the visual system