G21.2 ICD-10-CA code: Secondary parkinsonism due to other external agents
G21.2 is the ICD-10-CA code for “Secondary parkinsonism due to other external agents” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G21.2Secondary parkinsonism due to other external agents
Short description: Sec parkinsonism dt oth external agents
ICD-10-CA · Canada · Also written G212
Index terms
Entries in CIHI’s alphabetical index that lead to G21.2. Searching the index by the condition the note names is how coders reach this code.
- Parkinsonism (idiopathic) (primary), secondary, due to, external agents NEC
Notes for G21.2
As CIHI prints them, with any note G21.2 takes from the headings above it.
Use additional code
Add a code for this detail when the note documents it.
- Use additional external cause code (Chapter XX) to identify external agent.
Excludes
Conditions classified elsewhere.
- 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 G21.2 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G20-G26Extrapyramidal and movement disorders
- 3Category G21Secondary parkinsonism
- 4Valid code G21.2Secondary parkinsonism due to other external agents
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 G21.2 mean?
G21.2 is the ICD-10-CA code for “Secondary parkinsonism due to other external agents” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G21.2 in ICD-10-CA?
G21.2 sits under G21 Secondary parkinsonism, within G20-G26 Extrapyramidal and movement disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G21.2?
ICD-10-CA lists Use additional code, Excludes notes for G21.2, 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.