All ICD10 Codes

G90

Non-Billable
ChapterG00–G99
Rankcategory
Description

Disorders of autonomic nervous system

About ICD-10-CM code G90

G90 is the ICD-10-CM diagnosis code for Disorders of autonomic nervous system. It sits in G00-G99 Diseases of the Nervous System, within Other disorders of the nervous system (G89-G99). G90 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (7 billable, 3 non-billable)
G90.0Idiopathic peripheral autonomic neuropathyhas subcodesG90.1Familial dysautonomia [Riley-Day]G90.2Horner's syndromeG90.3Multi-system degeneration of the autonomic nervous systemG90.4Autonomic dysreflexiaG90.5Complex regional pain syndrome I (CRPS I)has subcodesG90.8Other disorders of autonomic nervous systemhas subcodesG90.9Disorder of the autonomic nervous system, unspecifiedG90.APostural orthostatic tachycardia syndrome [POTS]G90.BLMNB1-related autosomal dominant leukodystrophy
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • dysfunction of the autonomic nervous system due to alcohol (G31.2)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G89-G99Other disorders of the nervous system (G89-G99)
G90Disorders of autonomic nervous systemNot billable
G90.0Idiopathic peripheral autonomic neuropathySubcodes
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)Subcodes
G90.8Other disorders of autonomic nervous systemSubcodes
G90.9Disorder of the autonomic nervous system, unspecifiedBillable
G90.APostural orthostatic tachycardia syndrome [POTS]Billable
G90.BLMNB1-related autosomal dominant leukodystrophyBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G90:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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