ICD-10-CM > O00-O9A > O20-O29 > O23 > O23.5 > O23.52 O23.52 Salpingo-oophoritis in pregnancy Non-Billable/Non-Specific Applicable To Oophoritis in pregnancySalpingitis in pregnancy Codes O23.521Salpingo-oophoritis in pregnancy, first trimesterO23.522Salpingo-oophoritis in pregnancy, second trimesterO23.523Salpingo-oophoritis in pregnancy, third trimesterO23.529Salpingo-oophoritis in pregnancy, unspecified trimester