Is Q99.89 a billable ICD-10-CM code?

Yes. Q99.89 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q99.89 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).

Q99.89

Q99.89 — Other specified chromosome abnormalities

Billable / specific codeICD-10-CMPOA exempt

Q99.89 is a billable, specific ICD-10-CM code for other specified chromosome abnormalities. It is valid for submission on a claim.

Risk adjustment

Q99.89 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

addedFY2024-FY2026
Other specified chromosome abnormalities

Related codes at this level

Codes that share Q99.8. If Q99.89 is not quite right, the correct code is usually one of these.

Q99.81Usher syndrome

Questions about Q99.89

Is Q99.89 a billable ICD-10-CM code?: Yes. Q99.89 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q99.89 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).