Q90Category · further specificity requiredArchived

Down syndrome

HierarchyQ90-Q99 · Q90

Code-level instructions

Use additional code

code(s) to identify any associated degree of intellectual disabilities (F70-F79)

Code also

associated physical condition(s), such as atrioventricular septal defect (Q21.2-)

Inherited instructions

Chapters 17 · Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Excludes 2

inborn errors of metabolism (E70-E88)

Note

Codes from this chapter are not for use on maternal records

Q90-Q99 · Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Excludes 2

mitochondrial metabolic disorders (E88.4-)

More specific codes

Q90.0Trisomy 21, nonmosaicism (meiotic nondisjunction)Billable / specific Q90.1Trisomy 21, mosaicism (mitotic nondisjunction)Billable / specific Q90.2Trisomy 21, translocationBillable / specific Q90.9Down syndrome, unspecifiedBillable / specific

Code history

Latest recorded change · FY2024

ChangedUnchanged

FY2024

Effective from 2023-10-01

Code-level rules changed

Down syndrome

Category — select a more specific code

CDC/NCHS · FY2024

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	Inherited rules changed
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	Code-level rules changed
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code edition