Q90.9 ICD-10-CA code: Down's syndrome, unspecified
Q90.9 is the ICD-10-CA code for “Down's syndrome, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
Q90.9Down's syndrome, unspecified
Short description: Down's syndrome unspecified
ICD-10-CA · Canada · Also written Q909
Index terms
Entries in CIHI’s alphabetical index that lead to Q90.9. Searching the index by the condition the note names is how coders reach this code.
- Langdon Down's syndrome
- Down's disease or syndrome
- Trisomy (syndrome), 21 (partial)
- Syndrome, trisomy NEC, 21 (partial)
Notes for Q90.9
As CIHI prints them, with any note Q90.9 takes from the headings above it.
Includes
- Trisomy 21 NOS
Excludes
Conditions classified elsewhere.
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q90.9 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q90-Q99Chromosomal abnormalities, not elsewhere classified
- 3Category Q90Down's syndrome
- 4Valid code Q90.9Down's syndrome, 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 Q90.9 mean?
Q90.9 is the ICD-10-CA code for “Down's syndrome, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is Q90.9 in ICD-10-CA?
Q90.9 sits under Q90 Down's syndrome, within Q90-Q99 Chromosomal abnormalities, not elsewhere classified, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q90.9?
ICD-10-CA lists Includes, Excludes notes for Q90.9, 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.