Q90

Down syndrome

Header / non-billable

Choose the additional character

Q90 needs more characters to be billable. Pick the specific code below.

This code does not map to a risk-adjusting HCC in the loaded models.

Excludes 1 never coded together · Excludes 2 may co-exist

This code · Q90

Use additional

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 from Q90-Q99Chromosomal abnormalities, not elsewhere classified

Excludes 2

mitochondrial metabolic disorders (E88.4-)

Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities

Excludes 2

inborn errors of metabolism (E70-E88)

Note

Codes from this chapter are not for use on maternal records

Sections that reference Q90

Sections whose FY 2026 text names Q90, its Q90 category, or a range containing it — the chapter guidance above is the authoritative source.