Is Q90.1 a billable code?
Yes. Q90.1 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
Q90.1: Trisomy 21, mosaicism (mitotic nondisjunction)
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
Q90.1 is a billable ICD-10-CM diagnosis code for trisomy 21, mosaicism (mitotic nondisjunction). It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with Q90.1 already added.Good Faith EstimateStart a cost estimate with Q90.1 already added.CMS-1500 Claim FormFill a claim form with Q90.1 in box 21.
Other codes in Q90 Down syndrome
Q90.1 questions
What does Q90.1 mean?
Q90.1 is the ICD-10-CM code for Trisomy 21, mosaicism (mitotic nondisjunction). It is in chapter 17, Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.