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ICD-10-CM · FY 2026 APRIL UPDATE

G90

Disorders of autonomic nervous system

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
G90.0Idiopathic peripheral autonomic neuropathyCategory
G90.01Carotid sinus syncopeBillable
G90.09Other idiopathic peripheral autonomic neuropathyBillable
G90.1Familial dysautonomia [Riley-Day]Billable
G90.2Horner's syndromeBillable
G90.3Multi-system degeneration of the autonomic nervous systemBillable
G90.4Autonomic dysreflexiaBillable
G90.5Complex regional pain syndrome I (CRPS I)Category
G90.50Complex regional pain syndrome I, unspecifiedBillable
G90.51Complex regional pain syndrome I of upper limbCategory
G90.511Complex regional pain syndrome I of right upper limbBillable
G90.512Complex regional pain syndrome I of left upper limbBillable
G90.513Complex regional pain syndrome I of upper limb, bilateralBillable
G90.519Complex regional pain syndrome I of unspecified upper limbBillable
G90.52Complex regional pain syndrome I of lower limbCategory
G90.521Complex regional pain syndrome I of right lower limbBillable
G90.522Complex regional pain syndrome I of left lower limbBillable
G90.523Complex regional pain syndrome I of lower limb, bilateralBillable
G90.529Complex regional pain syndrome I of unspecified lower limbBillable
G90.59Complex regional pain syndrome I of other specified siteBillable
G90.8Other disorders of autonomic nervous systemCategory
G90.81Serotonin syndromeBillable
G90.89Other disorders of autonomic nervous systemBillable
G90.9Disorder of the autonomic nervous system, unspecifiedBillable
G90.APostural orthostatic tachycardia syndrome [POTS]Billable
G90.BLMNB1-related autosomal dominant leukodystrophyBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

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ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.