O16.1Billable
Unspecified maternal hypertension, first trimester
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O16
- Effective date
- October 1, 2026
Related codes in category O16
O16Unspecified maternal hypertensionO16.2Unspecified maternal hypertension, second trimesterYesO16.3Unspecified maternal hypertension, third trimesterYesO16.4Unspecified maternal hypertension, complicating childbirthYesO16.5Unspecified maternal hypertension, comp the puerperiumYesO16.9Unspecified maternal hypertension, unspecified trimesterYes
Frequently asked questions
What is ICD-10 code O16.1?
O16.1 is an ICD-10-CM diagnosis code for Unspecified maternal hypertension, first trimester.
Is O16.1 a billable code?
Yes. O16.1 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is O16.1 in?
O16.1 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O16.1 become effective?
O16.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O16.1?
O16.1 belongs to category O16, which includes 6 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.