G90
⚠ Non-billable (Header)Disorders of autonomic nervous system
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
directCannot be coded with G90
- • dysfunction of the autonomic nervous system due to alcohol (G31.2)
Child Codes (10)
G90.0Idiopathic peripheral autonomic neuropathyG90.1Familial dysautonomia [Riley-Day]G90.2Horner's syndromeG90.3Multi-system degeneration of the autonomic nervous systemG90.4Autonomic dysreflexiaG90.5Complex regional pain syndrome I (CRPS I)G90.8Other disorders of autonomic nervous systemG90.9Disorder of the autonomic nervous system, unspecifiedG90.APostural orthostatic tachycardia syndrome [POTS]G90.BLMNB1-related autosomal dominant leukodystrophy
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CodeG90
BillableNo — Header code
CategoryDiseases of the nervous system (G00-G99)
Excludes11 rule(s)
Excludes20 note(s)
Child codes10
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)