Q92.1 ICD-10-CA code: Whole chromosome trisomy, mosaicism (mitotic nondisjunction)
Q92.1 is the ICD-10-CA code for “Whole chromosome trisomy, mosaicism (mitotic nondisjunction)” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
Q92.1Whole chromosome trisomy, mosaicism (mitotic nondisjunction)
Short description: Whole chromosome trisomy mosaicism
ICD-10-CA · Canada · Also written Q921
Index terms
Entries in CIHI’s alphabetical index that lead to Q92.1. Searching the index by the condition the note names is how coders reach this code.
- Trisomy (syndrome), whole chromosome, mosaicism
- Trisomy (syndrome), whole chromosome, mitotic nondisjunction
- Trisomy (syndrome), chromosome specified NEC, whole (nonsex chromosome), mosaicism
- Trisomy (syndrome), chromosome specified NEC, whole (nonsex chromosome), mitotic nondisjunction
Notes for Q92.1
As CIHI prints them, with any note Q92.1 takes from the headings above it.
Includes
- Unbalanced translocations and insertionsFrom Q92 Other trisomies and partial trisomies of the autosomes, not elsewhere classified
Excludes
Conditions classified elsewhere.
- Trisomies of chromosomes 13, 18, 21 (Q90-Q91)From Q92 Other trisomies and partial trisomies of the autosomes, not elsewhere classified
- Inborn errors of metabolism (E70-E90)From Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Where Q92.1 sits
- 1ChapterChapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- 2Block Q90-Q99Chromosomal abnormalities, not elsewhere classified
- 3Category Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classified
- 4Valid code Q92.1Whole chromosome trisomy, mosaicism (mitotic nondisjunction)
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 Q92.1 mean?
Q92.1 is the ICD-10-CA code for “Whole chromosome trisomy, mosaicism (mitotic nondisjunction)” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is Q92.1 in ICD-10-CA?
Q92.1 sits under Q92 Other trisomies and partial trisomies of the autosomes, not elsewhere classified, within Q90-Q99 Chromosomal abnormalities, not elsewhere classified, within Chapter 17: Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
What coding notes apply to Q92.1?
ICD-10-CA lists Includes, Excludes notes for Q92.1, 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 Q92.1
View Q92Q92.0Whole chromosome trisomy, meiotic nondisjunctionQ92.2Major partial trisomyQ92.3Minor partial trisomyQ92.4Duplications seen only at prometaphaseQ92.5Duplications with other complex rearrangementsQ92.6Extra marker chromosomesQ92.7Triploidy and polyploidyQ92.8Other specified trisomies and partial trisomies of autosomesQ92.9Trisomy and partial trisomy of autosomes, unspecified