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G90 Disorders of autonomic nervous system

ICD-10-CM category G90 sits in Chapter 6 (Diseases of the nervous system, G00-G99). It contains 21 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

G90.0 Idiopathic peripheral autonomic neuropathyG90.5 Complex regional pain syndrome I (CRPS I)G90.51 Complex regional pain syndrome I of upper limbG90.52 Complex regional pain syndrome I of lower limbG90.8 Other disorders of autonomic nervous system

Billable codes in G90

CodeDescription
G90.01Carotid sinus syncope
G90.09Other idiopathic peripheral autonomic neuropathy
G90.1Familial dysautonomia [Riley-Day]
G90.2Horner's syndrome
G90.3Multi-system degeneration of the autonomic nervous system
G90.4Autonomic dysreflexia
G90.50Complex regional pain syndrome I, unspecified
G90.511Complex regional pain syndrome I of right upper limb
G90.512Complex regional pain syndrome I of left upper limb
G90.513Complex regional pain syndrome I of upper limb, bilateral
G90.519Complex regional pain syndrome I of unspecified upper limb
G90.521Complex regional pain syndrome I of right lower limb
G90.522Complex regional pain syndrome I of left lower limb
G90.523Complex regional pain syndrome I of lower limb, bilateral
G90.529Complex regional pain syndrome I of unspecified lower limb
G90.59Complex regional pain syndrome I of other specified site
G90.81Serotonin syndrome
G90.89Other disorders of autonomic nervous system
G90.9Disorder of the autonomic nervous system, unspecified
G90.APostural orthostatic tachycardia syndrome [POTS]
G90.BLMNB1-related autosomal dominant leukodystrophy

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