08Diseases of the nervous system
Disorders of autonomic nervous system
8D8AFocal or segmental autonomic disorders
8D8A.2
category
Episodic anisocoria
Definition This is a group of disorders in which periodic pupillary movements lead to changes in size. These are due to abnormal parasympathetic or sympathetic tone.
Also indexed as
Episodic anisocoria
Nearby in Focal or segmental autonomic disorders
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
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This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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