O10 – Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
ICD-10-CM 2027 diagnosis code · Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
ICD-10-CM code
O10
- Code
O10(claims format:O10)- Description
- Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
- Short description
- Pre-existing hypertension compl preg/chldbrth
- 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 O10
O10 is a header code and cannot be used on claims. Choose the most specific code:
- O10.0 – Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
- O10.1 – Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
- O10.2 – Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
- O10.3 – Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
- O10.4 – Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
- O10.9 – Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperiumHeader (more codes below)
Notes for O10
Includes:
- pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
Excludes2 (not included here):
- pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)
Frequently asked questions
What is ICD-10 code O10?
O10 is the ICD-10-CM code for pre-existing hypertension complicating pregnancy, childbirth and the puerperium, in the block O10-O16 (Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium).
Is O10 a billable code?
No. O10 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.