G20 ICD-10-CA code: Parkinson's disease
G20 is the ICD-10-CA code for “Parkinson's disease” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G20Parkinson's disease
ICD-10-CA · Canada
Index terms
Entries in CIHI’s alphabetical index that lead to G20. Searching the index by the condition the note names is how coders reach this code.
- Palsy, shaking
- Hemiparkinsonism
- Tremor, Parkinson's
- Syndrome, parkinsonian
- Shaking palsy or paralysis
- Syndrome, paralysis agitans
- Pill roller hand (intrinsic)
- Parkinsonism (idiopathic) (primary)
- Parkinson's disease, syndrome or tremor
- Paralysis, paralytic (complete) (incomplete), agitans
- Paralysis, paralytic (complete) (incomplete), shaking
- Paralysis, paralytic (complete) (incomplete), trembling
Notes for G20
As CIHI prints them, with any note G20 takes from the headings above it.
Includes
- HemiparkinsonismParalysis agitansParkinsonism or Parkinson's disease:• NOS• idiopathic• primary
Excludes
Conditions classified elsewhere.
- With Alzheimer's disease (G30.81)
- 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 G20 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G20-G26Extrapyramidal and movement disorders
- 3Valid code G20Parkinson's disease
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 G20 mean?
G20 is the ICD-10-CA code for “Parkinson's disease” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G20 in ICD-10-CA?
G20 sits under G20-G26 Extrapyramidal and movement disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G20?
ICD-10-CA lists Includes, Excludes notes for G20, 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.