O16 – Unspecified maternal hypertension
ICD-10-CM 2027 diagnosis code · Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
ICD-10-CM code
O16
- Code
O16(claims format:O16)- Description
- Unspecified maternal hypertension
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 15. Pregnancy, childbirth and the puerperium (O00-O9A)
- Block
- O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
Billable codes under O16
O16 is a header code and cannot be used on claims. Choose the most specific code:
- O16.1 – Unspecified maternal hypertension, first trimesterBillable
- O16.2 – Unspecified maternal hypertension, second trimesterBillable
- O16.3 – Unspecified maternal hypertension, third trimesterBillable
- O16.4 – Unspecified maternal hypertension, complicating childbirthBillable
- O16.5 – Unspecified maternal hypertension, complicating the puerperiumBillable
- O16.9 – Unspecified maternal hypertension, unspecified trimesterBillable
Index terms for O16
Entries in the ICD-10-CM alphabetic index that lead to this code:
Frequently asked questions
What is ICD-10 code O16?
O16 is the ICD-10-CM code for unspecified maternal hypertension, in the block O10-O16 (Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium).
Is O16 a billable code?
No. O16 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.