G90 ICD-10-CM Code: Disorders of autonomic nervous system
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
G90Disorders of autonomic nervous system
ICD-10-CM diagnosis code · United States clinical modification
Where G90 sits
- 1
Chapter 6
Diseases of the nervous system (G00-G99)
- 2
Section
Other disorders of the nervous system (G89-G99)
- 3
Category G90
Disorders of autonomic nervous system
- 4
Code G90
Disorders of autonomic nervous system
Codes under G90
G90 is a non-billable category. Choose the child code that best matches the documented diagnosis.
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 leukodystrophyNotes for this code
Inclusion terms
No inclusion terms are listed for G90.
Code first
No “code first” instruction is listed for G90.
Use additional code
No “use additional code” instruction is listed for G90.
Excludes1
Conditions that should not be reported together with this code.
- dysfunction of the autonomic nervous system due to alcohol (G31.2)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for G90.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code G90 mean?
G90 is the FY 2027 U.S. ICD-10-CM code for “Disorders of autonomic nervous system.”
Is G90 a billable or specific ICD-10-CM code?
No. G90 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is G90 located in ICD-10-CM?
G90 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Other disorders of the nervous system (G89-G99) (G89–G99), under category G90, Disorders of autonomic nervous system.
What coding notes are listed for G90?
No inclusion terms are listed for G90 in this reference record. No code-first instruction is listed. Excludes1 notes: dysfunction of the autonomic nervous system due to alcohol (G31.2). No Excludes2 note is listed.