G90 Disorders of autonomic nervous system

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Disorders of autonomic nervous system is G90 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
G89-G99: Other disorders of the nervous system (G89-G99)
Category G90
27 codes (21 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with G90.
  • dysfunction of the autonomic nervous system due to alcohol (G31.2)

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.a
Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.6.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

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

Related Codes in G90

G90.0 Idiopathic peripheral autonomic neuropathy G90.01 Carotid sinus syncope G90.09 Other idiopathic peripheral autonomic neuropathy G90.1 Familial dysautonomia [Riley-Day] G90.2 Horner's syndrome G90.3 Multi-system degeneration of the autonomic nervous system G90.4 Autonomic dysreflexia G90.5 Complex regional pain syndrome I (CRPS I) G90.50 Complex regional pain syndrome I, unspecified G90.51 Complex regional pain syndrome I of upper limb G90.511 Complex regional pain syndrome I of right upper limb G90.512 Complex regional pain syndrome I of left upper limb G90.513 Complex regional pain syndrome I of upper limb, bilateral G90.519 Complex regional pain syndrome I of unspecified upper limb G90.52 Complex regional pain syndrome I of lower limb G90.521 Complex regional pain syndrome I of right lower limb G90.522 Complex regional pain syndrome I of left lower limb G90.523 Complex regional pain syndrome I of lower limb, bilateral G90.529 Complex regional pain syndrome I of unspecified lower limb G90.59 Complex regional pain syndrome I of other specified site
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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