Is O16 a billable code?
No. O16 is a header code that groups 6 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
O16: Unspecified maternal hypertension
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
O16 groups related diagnoses under unspecified maternal hypertension. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under O16
- 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
O16 questions
What does O16 mean?
O16 is the ICD-10-CM code for Unspecified maternal hypertension. It is in chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.