Is Q90 a billable ICD-10-CM code?

No. Q90 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q90 sit in the tabular list?

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

Q90

Q90 — Down syndrome

Non-billable headerICD-10-CM

Q90 is a non-billable header ICD-10-CM code for down syndrome. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

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

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

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

Other codes that can never be billed with Q90

These codes carry an Excludes1 note pointing at Q90. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q90 alone.

Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classified
Z15Genetic susceptibility to disease
E25Adrenogenital disorders

Risk adjustment

Q90 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 to one of these instead Q90

4 child codes. Green means billable.

Questions about Q90

Is Q90 a billable ICD-10-CM code?: No. Q90 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q90 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).