Is Q35 a billable ICD-10-CM code?

No. Q35 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q35 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Cleft lip and cleft palate (Q35-Q37).

What cannot be coded together with Q35?

Q35 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

Q35

Q35 — Cleft palate

Non-billable headerICD-10-CM

Q35 is a non-billable header ICD-10-CM code for cleft palate. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

cleft palate with cleft lip (Q37.-)

Includes

Conditions this code covers.

fissure of palate
palatoschisis

Other codes that can never be billed with Q35

These codes carry an Excludes1 note pointing at Q35. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q35 alone.

Q18Other congenital malformations of face and neck
Q38.5Congenital malformations of palate, not elsewhere classified

Risk adjustment

Q35 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 Q35

5 child codes. Green means billable.

Questions about Q35

Is Q35 a billable ICD-10-CM code?: No. Q35 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q35 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Cleft lip and cleft palate (Q35-Q37).
What cannot be coded together with Q35?: Q35 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.