ICD-10-CM > O00-O9A > O30-O48 > O34 > O34.3 O34.3 Maternal care for cervical incompetence Non-Billable/Non-Specific Applicable To Maternal care for cerclage with or without cervical incompetenceMaternal care for Shirodkar suture with or without cervical incompetence Codes O34.30Maternal care for cervical incompetence, unspecified trimesterO34.31Maternal care for cervical incompetence, first trimesterO34.32Maternal care for cervical incompetence, second trimesterO34.33Maternal care for cervical incompetence, third trimester