G90.9 ICD-10-CA code: Disorder of autonomic nervous system, unspecified
G90.9 is the ICD-10-CA code for “Disorder of autonomic nervous system, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G90.9Disorder of autonomic nervous system, unspecified
Short description: Disorder autonomic nervous system NOS
ICD-10-CA · Canada · Also written G909
Index terms
Entries in CIHI’s alphabetical index that lead to G90.9. Searching the index by the condition the note names is how coders reach this code.
- Disturbance, sympathetic (nerve)
- Disorder (of), nerve, sympathetic
- Neuropathy, neuropathic, autonomic
- Disorder (of), autonomic nervous system
- Disorder (of), nervous system, vegetative
- Disorder (of), nervous system, sympathetic
- Disease, diseased, nervous system, autonomic
- Disease, diseased, nervous system, vegetative
- Disease, diseased, sympathetic nervous system
- Disease, diseased, nervous system, sympathetic
- Disorder (of), nervous system, parasympathetic
- Disease, diseased, nervous system, parasympathetic
- Degeneration, degenerative, nervous system, autonomic
- Disorder (of), nervous system, autonomic (peripheral)
- Neuropathy, neuropathic, peripheral (nerve), autonomic
- Disease, diseased, peripheral, autonomic nervous system
Notes for G90.9
As CIHI prints them, with any note G90.9 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Dysfunction of autonomic nervous system due to alcohol (G31.2)From G90 Disorders of autonomic nervous system
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)
Where G90.9 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G90-G99Other disorders of the nervous system
- 3Category G90Disorders of autonomic nervous system
- 4Valid code G90.9Disorder of autonomic nervous system, unspecified
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code G90.9 mean?
G90.9 is the ICD-10-CA code for “Disorder of autonomic nervous system, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G90.9 in ICD-10-CA?
G90.9 sits under G90 Disorders of autonomic nervous system, within G90-G99 Other disorders of the nervous system, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G90.9?
ICD-10-CA lists Excludes notes for G90.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside G90.9
View G90G90.0Idiopathic peripheral autonomic neuropathyG90.1Familial dysautonomia [Riley-Day]G90.2Horner's syndromeG90.4Autonomic dysreflexiaG90.5Complex regional pain syndrome, type IG90.6Complex regional pain syndrome, type IIG90.7Complex regional pain syndrome, other and unspecified typeG90.8Other disorders of autonomic nervous system