ICD-10-CM · Chapter 15 · O00–O9A
O16
Unspecified maternal hypertension
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
- O16
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 15 — Pregnancy, childbirth and the puerperium
- Category
- O16
- Specificity
- 3 characters
How coders use this code
ICD-10-CM O16 is a category (header) for unspecified maternal hypertension. 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 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
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