9B01

ICD-11 MMS 2026-01

Disorders of the efferent pupillary system

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

  • 9B01.0 – Physiologic anisocoria
  • 9B01.1 – Parasympathoparetic pupils
  • 9B01.2 – Pharmacologic inhibition of the parasympathetic pathway
  • 9B01.3 – Iris sphincter disorders
  • 9B01.4 – Pharmacologic parasympathicotonic pupils
  • 9B01.5 – Pharmacologic sympathoparetic pupils
  • 9B01.6 – Sympathotonic pupils
  • 9B01.7 – Episodic unilateral mydriasis
  • 9B01.Y – Other specified disorders of the efferent pupillary system
  • 9B01.Z – Disorders of the efferent pupillary system, unspecified

Foundation children elsewhere

Sibling codes

  • 9B00 – Disorders of the afferent pupillary system
  • 9B02 – Light-near dissociations
  • 9B0Y – Other specified functional disorders of the pupil
  • 9B0Z – Functional disorders of the pupil, unspecified

Foundation entity

Disorders of the efferent pupillary system – http://id.who.int/icd/entity/879387721

Allowed postcoordination axes

Part of: 09: Diseases of the visual system