O10.9Header code — not billable
Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium
Short description: Unsp pre-existing hypertension compl preg/chldbrth
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O10
- Effective date
- October 1, 2026
Related codes in category O10
O10Pre-existing hypertension compl preg/chldbrthO10.0Pre-existing essential hypertension compl preg/chldbrthO10.01Pre-existing essential hypertension complicating pregnancyO10.011Pre-existing essential htn comp pregnancy, first trimesterYesO10.012Pre-existing essential htn comp pregnancy, second trimesterYesO10.013Pre-existing essential htn comp pregnancy, third trimesterYesO10.019Pre-existing essential htn comp pregnancy, unsp trimesterYesO10.02Pre-existing essential hypertension complicating childbirthYesO10.03Pre-existing essential hypertension comp the puerperiumYesO10.1Pre-existing hypertensive heart disease compl preg/chldbrthO10.11Pre-existing hypertensive heart disease comp pregnancyO10.111Pre-exist hyp heart disease comp pregnancy, first trimesterYes
Frequently asked questions
What is ICD-10 code O10.9?
O10.9 is an ICD-10-CM diagnosis code for Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium.
Is O10.9 a billable code?
No. O10.9 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is O10.9 in?
O10.9 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O10.9 become effective?
O10.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O10.9?
O10.9 belongs to category O10, which includes 12 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.