ICD-10-CM › G00-G99 › G89-G99 › G90 Disorders of autonomic nervous system › G90.2

G90.2

Horner's syndrome

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2007 Added to the draft code set draft Horner's syndrome

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from G90 Disorders of autonomic nervous system

Excludes1 - never coded here

  • dysfunction of the autonomic nervous system due to alcohol (G31.2)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
G90.0 Idiopathic peripheral autonomic neuropathy Not billable
G90.1 Familial dysautonomia [Riley-Day] Valid
G90.3 Multi-system degeneration of the autonomic nervous system Valid
G90.4 Autonomic dysreflexia Valid
G90.5 Complex regional pain syndrome I (CRPS I) Not billable
G90.8 Other disorders of autonomic nervous system Not billable
G90.9 Disorder of the autonomic nervous system, unspecified Valid
G90.A Postural orthostatic tachycardia syndrome [POTS] Valid
G90.B LMNB1-related autosomal dominant leukodystrophy Valid