Now available: AI Scribe & Transcription — clinical notes that write themselves.See it in action →
Get Started FREE
PlatformAI ScribePricingSpecialtiesFree ToolsBlogSupport
Log in Get Started FREE
ICD-10-CM category

G90: Disorders of autonomic nervous system

52 subcodes · 42 billable · Look up any code with the ICD-10 search

Codes under G90 (Disorders of autonomic nervous system). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

CodeDescriptionBillable
G90.0 Idiopathic peripheral autonomic neuropathy —
G90.0 Idiopathic peripheral autonomic neuropathy —
G90.01 Carotid sinus syncope ✓
G90.01 Carotid sinus syncope ✓
G90.1 Familial dysautonomia [Riley-Day] ✓
G90.1 Familial dysautonomia [Riley-Day] ✓
G90.2 Horner's syndrome ✓
G90.2 Horner's syndrome ✓
G90.3 Multi-system degeneration of the autonomic nervous system ✓
G90.3 Multi-system degeneration of the autonomic nervous system ✓
G90.4 Autonomic dysreflexia ✓
G90.4 Autonomic dysreflexia ✓
G90.5 Complex regional pain syndrome I (CRPS I) —
G90.5 Complex regional pain syndrome I (CRPS I) —
G90.8 Other disorders of autonomic nervous system —
G90.8 Other disorders of autonomic nervous system —
G90.09 Other idiopathic peripheral autonomic neuropathy ✓
G90.09 Other idiopathic peripheral autonomic neuropathy ✓
G90.9 Disorder of the autonomic nervous system, unspecified ✓
G90.9 Disorder of the autonomic nervous system, unspecified ✓
G90.50 Complex regional pain syndrome I, unspecified ✓
G90.50 Complex regional pain syndrome I, unspecified ✓
G90.51 Complex regional pain syndrome I of upper limb —
G90.51 Complex regional pain syndrome I of upper limb —
G90.52 Complex regional pain syndrome I of lower limb —
G90.52 Complex regional pain syndrome I of lower limb —
G90.59 Complex regional pain syndrome I of other specified site ✓
G90.59 Complex regional pain syndrome I of other specified site ✓
G90.81 Serotonin syndrome ✓
G90.81 Serotonin syndrome ✓
G90.89 Other disorders of autonomic nervous system ✓
G90.89 Other disorders of autonomic nervous system ✓
G90.511 Complex regional pain syndrome I of right upper limb ✓
G90.511 Complex regional pain syndrome I of right upper limb ✓
G90.512 Complex regional pain syndrome I of left upper limb ✓
G90.512 Complex regional pain syndrome I of left upper limb ✓
G90.513 Complex regional pain syndrome I of upper limb, bilateral ✓
G90.513 Complex regional pain syndrome I of upper limb, bilateral ✓
G90.519 Complex regional pain syndrome I of unspecified upper limb ✓
G90.519 Complex regional pain syndrome I of unspecified upper limb ✓
G90.521 Complex regional pain syndrome I of right lower limb ✓
G90.521 Complex regional pain syndrome I of right lower limb ✓
G90.522 Complex regional pain syndrome I of left lower limb ✓
G90.522 Complex regional pain syndrome I of left lower limb ✓
G90.523 Complex regional pain syndrome I of lower limb, bilateral ✓
G90.523 Complex regional pain syndrome I of lower limb, bilateral ✓
G90.529 Complex regional pain syndrome I of unspecified lower limb ✓
G90.529 Complex regional pain syndrome I of unspecified lower limb ✓
G90.A Postural orthostatic tachycardia syndrome [POTS] ✓
G90.A Postural orthostatic tachycardia syndrome [POTS] ✓
G90.B LMNB1-related autosomal dominant leukodystrophy ✓
G90.B LMNB1-related autosomal dominant leukodystrophy ✓

Frequently asked questions

What is ICD-10-CM code G90?

G90 is an ICD-10-CM category covering Disorders of autonomic nervous system. It contains 52 more specific diagnosis codes, 42 of which are billable.

Is G90 a billable code?

No — G90 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example G90.0 — Idiopathic peripheral autonomic neuropathy). 42 of the 52 codes under G90 are billable.

What codes fall under G90?

G90 includes G90.0, G90.0, G90.01, G90.01, G90.1, plus 47 more. See the full list with descriptions and billable status above.

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right

Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.

Get Started FREE Talk to us
100% Satisfaction Guaranteed — try it risk-free