ICD-10-CM · Chapter 15 · O00–O9A
O11
Pre-existing hypertension with pre-eclampsia
Pregnancy, childbirth and the puerperium
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- O11
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 15 — Pregnancy, childbirth and the puerperium
- Category
- O11
- Specificity
- 3 characters
How coders use this code
ICD-10-CM O11 is a category (header) for pre-existing hypertension with pre-eclampsia. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in O11
- O11.1Pre-existing hypertension with pre-eclampsia, first trimester
- O11.2Pre-existing hypertension with pre-eclampsia, second trimester
- O11.3Pre-existing hypertension with pre-eclampsia, third trimester
- O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirth
- O11.5Pre-existing hypertension with pre-eclampsia, complicating the puerperium
- O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimester
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