ICD-10-CM > O00-O9A > O30-O48 > O34 > O34.4 O34.4 Maternal care for other abnormalities of cervix Non-Billable/Non-Specific Codes O34.40Maternal care for other abnormalities of cervix, unspecified trimesterO34.41Maternal care for other abnormalities of cervix, first trimesterO34.42Maternal care for other abnormalities of cervix, second trimesterO34.43Maternal care for other abnormalities of cervix, third trimester