G23.8 ICD-10-CA code: Other specified degenerative diseases of basal ganglia
G23.8 is the ICD-10-CA code for “Other specified degenerative diseases of basal ganglia” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G23.8Other specified degenerative diseases of basal ganglia
Short description: Oth spec degenerative dis basal ganglia
ICD-10-CA · Canada · Also written G238
Index terms
Entries in CIHI’s alphabetical index that lead to G23.8. Searching the index by the condition the note names is how coders reach this code.
- Shy Drager syndrome
- Fahr's disease (of brain)
- Calcification, basal ganglia
- Disease, diseased, basal ganglia, degenerative, specified NEC
- Hypotension (arterial) (constitutional), neurogenic, orthostatic
- Degeneration, degenerative, basal nuclei or ganglia, specified NEC
- Hypotension (arterial) (constitutional), orthostatic (chronic), neurogenic
- Parkinsonism (idiopathic) (primary), with, neurogenic orthostatic hypotension (symptomatic)
Notes for G23.8
As CIHI prints them, with any note G23.8 takes from the headings above it.
Includes
- Calcification of basal gangliaNeurogenic orthostatic hypotension [Shy-Drager]
Excludes
Conditions classified elsewhere.
- Orthostatic hypotension NOS (I95.1)
- 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 G23.8 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G20-G26Extrapyramidal and movement disorders
- 3Category G23Other degenerative diseases of basal ganglia
- 4Valid code G23.8Other specified degenerative diseases of basal ganglia
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 G23.8 mean?
G23.8 is the ICD-10-CA code for “Other specified degenerative diseases of basal ganglia” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G23.8 in ICD-10-CA?
G23.8 sits under G23 Other degenerative diseases of basal ganglia, within G20-G26 Extrapyramidal and movement disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G23.8?
ICD-10-CA lists Includes, Excludes notes for G23.8, 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.