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Q90

Non-billable

Down 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

Use additional code

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

Notes

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

Frequently asked questions

What is ICD-10 code Q90?
Q90 is the ICD-10-CM code for "Down syndrome". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q90 a billable code?
No — Q90 is a non-billable header code. Use a more specific child code (such as Q90.0) for billing.
What are the subcodes of Q90?
Q90 has 4 more specific child codes, including Q90.0, Q90.1, Q90.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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