O16.9 – Unspecified maternal hypertension, unspecified trimester
ICD-10-CM 2027 diagnosis code · Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
ICD-10-CM code
O16.9
- Code
O16.9(claims format:O169)- Description
- Unspecified maternal hypertension, unspecified trimester
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
- Parent codes
- O16
Related codes in O16
- 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
Frequently asked questions
What is ICD-10 code O16.9?
O16.9 is the ICD-10-CM code for unspecified maternal hypertension, unspecified trimester, in the block O10-O16 (Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium).
Is O16.9 a billable code?
Yes. O16.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does O16.9 belong to?
It belongs to category O16 – Unspecified maternal hypertension.
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.