Is Q90.9 a billable ICD-10 code?

Yes. Q90.9 (Down syndrome, unspecified) is billable and can be used for insurance claims. Always verify payer-specific requirements.

Q90.9 ✓ Billable

Down syndrome, unspecified

Q: What is ICD-10 code Q90.9?

ICD-10-CM code Q90.9 stands for "Down syndrome, unspecified". It is a billable code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities

Code

Q90.9

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Congenital Malformations, Deformations and Chromosomal Abnormalities

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code Q90.9?

ICD-10-CM code Q90.9 represents Down syndrome, unspecified. It is a billable diagnosis code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.

Is Q90.9 billable?

Yes. Q90.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is Q90.9 in?

Q90.9 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.

Related codes in the Q90 category

Q90 Down syndrome Non-billable Q90.0 Trisomy 21, nonmosaicism (meiotic nondisjunction) Billable Q90.1 Trisomy 21, mosaicism (mitotic nondisjunction) Billable Q90.2 Trisomy 21, translocation Billable

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