O23 - Infections of genitourinary tract in pregnancy
O23.2 - Infections of urethra in pregnancy
O23.20 - Infections of urethra in pregnancy, unspecified trimester
O23.21 - Infections of urethra in pregnancy, first trimester
O23.22 - Infections of urethra in pregnancy, second trimester
O23.23 - Infections of urethra in pregnancy, third trimester