O23.521Billable
Salpingo-oophoritis in pregnancy, first trimester
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O23
- Effective date
- October 1, 2026
Related codes in category O23
O23Infections of genitourinary tract in pregnancyO23.0Infections of kidney in pregnancyO23.00Infections of kidney in pregnancy, unspecified trimesterYesO23.01Infections of kidney in pregnancy, first trimesterYesO23.02Infections of kidney in pregnancy, second trimesterYesO23.03Infections of kidney in pregnancy, third trimesterYesO23.1Infections of bladder in pregnancyO23.10Infections of bladder in pregnancy, unspecified trimesterYesO23.11Infections of bladder in pregnancy, first trimesterYesO23.12Infections of bladder in pregnancy, second trimesterYesO23.13Infections of bladder in pregnancy, third trimesterYesO23.2Infections of urethra in pregnancy
Frequently asked questions
What is ICD-10 code O23.521?
O23.521 is an ICD-10-CM diagnosis code for Salpingo-oophoritis in pregnancy, first trimester.
Is O23.521 a billable code?
Yes. O23.521 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is O23.521 in?
O23.521 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O23.521 become effective?
O23.521 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O23.521?
O23.521 belongs to category O23, 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.