Is O9A a billable ICD-10-CM code?

No. O9A is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does O9A sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).

O9A

O9A — Maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Non-billable headerICD-10-CM

O9A is a non-billable header ICD-10-CM code for maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with O9A

These codes carry an Excludes1 note pointing at O9A. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O9A alone.

Z33.1Pregnant state, incidental
Z34Encounter for supervision of normal pregnancy
T74Adult and child abuse, neglect and other maltreatment, confirmed
T76Adult and child abuse, neglect and other maltreatment, suspected

Risk adjustment

O9A 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 O9A

5 child codes. Green means billable.

Questions about O9A

Is O9A a billable ICD-10-CM code?: No. O9A is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does O9A sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Other obstetric conditions, not elsewhere classified (O94-O9A).