O9A.21Header code — not billable
Injury, poisoning and certain other consequences of external causes complicating pregnancy
Short description: Inj/poisn/oth conseq of external causes comp pregnancy
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O9A
- Effective date
- October 1, 2026
Related codes in category O9A
O9AMaternl malig or injury compl preg/childbrthO9A.1Malignant neoplasm compl preg/chldbrthO9A.11Malignant neoplasm complicating pregnancyO9A.111Malignant neoplasm complicating pregnancy, first trimesterYesO9A.112Malignant neoplasm complicating pregnancy, second trimesterYesO9A.113Malignant neoplasm complicating pregnancy, third trimesterYesO9A.119Malignant neoplasm complicating pregnancy, unsp trimesterYesO9A.12Malignant neoplasm complicating childbirthYesO9A.13Malignant neoplasm complicating the puerperiumYesO9A.2Inj/poisn/oth conseq of external causes compl preg/chldbrthO9A.211Inj/poisn/oth conseq of external causes comp preg, first triYesO9A.212Inj/poisn/oth conseq of extrn causes comp preg, second triYes
Frequently asked questions
What is ICD-10 code O9A.21?
O9A.21 is an ICD-10-CM diagnosis code for Injury, poisoning and certain other consequences of external causes complicating pregnancy.
Is O9A.21 a billable code?
No. O9A.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 O9A.21 in?
O9A.21 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O9A.21 become effective?
O9A.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O9A.21?
O9A.21 belongs to category O9A, 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.