O09.21Header code — not billable
Supervision of pregnancy with history of pre-term labor
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O09
- Effective date
- October 1, 2026
Related codes in category O09
O09Supervision of high risk pregnancyO09.0Supervision of pregnancy with history of infertilityO09.00Suprvsn of preg w history of infertility, unsp trimesterYesO09.01Suprvsn of preg w history of infertility, first trimesterYesO09.02Suprvsn of preg w history of infertility, second trimesterYesO09.03Suprvsn of preg w history of infertility, third trimesterYesO09.1Supervision of pregnancy with history of ectopic pregnancyO09.10Suprvsn of preg with history of ectopic preg, unsp trimesterYesO09.11Suprvsn of preg with history of ectopic preg, first triYesO09.12Suprvsn of preg with history of ectopic preg, second triYesO09.13Suprvsn of preg with history of ectopic preg, third triYesO09.2Suprvsn of pregnancy w poor reprodctv or obstetric history
Frequently asked questions
What is ICD-10 code O09.21?
O09.21 is an ICD-10-CM diagnosis code for Supervision of pregnancy with history of pre-term labor.
Is O09.21 a billable code?
No. O09.21 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 O09.21 in?
O09.21 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O09.21 become effective?
O09.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O09.21?
O09.21 belongs to category O09, 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.