G90Header code — not billable
Disorders of autonomic nervous system
- Chapter
- 6. Diseases of the nervous system
- Category
- G90
- Effective date
- October 1, 2026
Related codes in category G90
G90.0Idiopathic peripheral autonomic neuropathyG90.01Carotid sinus syncopeYesG90.09Other idiopathic peripheral autonomic neuropathyYesG90.1Familial dysautonomia [Riley-Day]YesG90.2Horner's syndromeYesG90.3Multi-system degeneration of the autonomic nervous systemYesG90.4Autonomic dysreflexiaYesG90.5Complex regional pain syndrome I (CRPS I)G90.50Complex regional pain syndrome I, unspecifiedYesG90.51Complex regional pain syndrome I of upper limbG90.511Complex regional pain syndrome I of right upper limbYesG90.512Complex regional pain syndrome I of left upper limbYes
Frequently asked questions
What is ICD-10 code G90?
G90 is an ICD-10-CM diagnosis code for Disorders of autonomic nervous system.
Is G90 a billable code?
No. G90 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is G90 in?
G90 falls under Chapter 6: Diseases of the nervous system.
When did G90 become effective?
G90 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to G90?
G90 belongs to category G90, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.