Q90
Non-billableDown syndrome
Q90 is the ICD-10-CM code for Down syndrome. It is a non-billable category code — use a more specific child code such as Q90.0 for billing.
- Status
- Header (non-billable)
- Chapter
- Q00-Q99
- Subcodes
- 4
- Edition
- FY2026
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
What this means — in plain language
MedlinePlus · NIHWhat is Down syndrome? Down syndrome is a condition in which a person has an extra chromosome or an extra piece of a chromosome. This extra copy changes how a baby's body and brain develop. It can cause both mental and physical challenges during their lifetime. Even though people with Down syndrome might act and look similar, each person has different abilities. What causes Down syndrome? Chromosomes are tiny…
Read more about Down Syndrome at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Use additional code
Notes
- •associated physical condition(s), such as atrioventricular septal defect (Q21.2-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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