O16
O16: Unspecified maternal hypertension
Non-billable headerICD-10-CM
O16 is a non-billable header ICD-10-CM code for unspecified maternal hypertension. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with O16
Their own Excludes1 notes name this code, so the conflict is not listed above.
- I10Essential (primary) hypertension
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead O16
6 child codes. Green means billable.
- O16.1Unspecified maternal hypertension, first trimester
- O16.2Unspecified maternal hypertension, second trimester
- O16.3Unspecified maternal hypertension, third trimester
- O16.4Unspecified maternal hypertension, complicating childbirth
- O16.5Unspecified maternal hypertension, complicating the puerperium
- O16.9Unspecified maternal hypertension, unspecified trimester