ICD-10-CM 2027
ICD-10 code for sympathetic nerve disturbance
From the official ICD-10-CM alphabetic index entry “Disturbance (s) › sympathetic (nerve)”. Page updated September 29, 2026.
About coding sympathetic nerve disturbance
The ICD-10-CM code for sympathetic nerve disturbance is G90.9 (Disorder of the autonomic nervous system, unspecified).
Within G90, choose G90.9 (Disorder of the autonomic nervous system, unspecified) only when documentation doesn't support a more specific option: idiopathic peripheral autonomic neuropathy (G90.0), familial dysautonomia [Riley-Day] (G90.1), Horner's syndrome (G90.2), Multi-system degeneration of the autonomic nervous system (G90.3), autonomic dysreflexia (G90.4), complex regional pain syndrome I (CRPS I) (G90.5), other disorders of autonomic nervous system (G90.8), postural orthostatic tachycardia syndrome [POTS] (G90.A) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about sympathetic nerve disturbance ICD-10 codes
What is the ICD-10 code for sympathetic nerve disturbance?
- G90.9 — Disorder of the autonomic nervous system, unspecified.
Is G90.9 billable?
- Yes. G90.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G90.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G90.9 as a principal diagnosis.
Is G90.9 a CC or MCC?
- No. G90.9 is neither a CC nor an MCC under MS-DRG v44.0.