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G90 - Disorders of autonomic nervous system

ICD-10-CM Chapter 6: Diseases of the nervous system · G89-G99 Other disorders of the nervous system (G89-G99) · Top-level category · FY2027

Coding Guidance

G90 is a non-billable heading. Report one of the 10 more specific codes below.

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom G90

Mutually exclusive: these conditions are never reported together with this code.

  • dysfunction of the autonomic nervous system due to alcohol (G31.2)
Excludes 2 — Not Included HereFrom Chapter G00-G99

Not part of this code; report both codes when the patient has both conditions.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More Specific Codes (10)

G90.0Idiopathic peripheral autonomic neuropathy→G90.1Familial dysautonomia [Riley-Day]→G90.2Horner's syndrome→G90.3Multi-system degeneration of the autonomic nervous system→G90.4Autonomic dysreflexia→G90.5Complex regional pain syndrome I (CRPS I)→G90.8Other 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→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with G90.