9C80.4

ICD-11 MMS 2026-01

Heterophoria

Description

A temporary deviation of the eyes from normal binocular alignment when there is disruption of the visual input from one eye. The alignment is normal when there is binocular visual input.

Index terms

  • Heterophoria
  • phoria
  • Esophoria
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  • Intermittent esophoria
  • Exophoria
  • Vertical heterophoria
  • Cyclophoria
  • Excyclophoria
  • Incyclophoria
  • Hyperphoria
  • latent strabismus
  • Alternating hyperphoria
  • Hypophoria

Inclusions

  • Esophoria
  • Exophoria

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

  • 9C80.0 – Esotropia
  • 9C80.1 – Exotropia
  • 9C80.2 – Vertical or torsional strabismus
  • 9C80.3 – Intermittent strabismus
  • 9C80.5 – Mechanical strabismus
  • 9C80.Y – Other specified non paralytic strabismus
  • 9C80.Z – Non paralytic strabismus, unspecified

Foundation entity

Heterophoria – http://id.who.int/icd/entity/2037347723

Allowed postcoordination axes

Part of: 9C80: Non paralytic strabismus › 09: Diseases of the visual system