O09.9 Supervision of high risk pregnancy, unspecifiedNon-billable header with 4 child codes.
O09.90 Supervision of high risk pregnancy, unspecified, unspecified trimesterO09.91 Supervision of high risk pregnancy, unspecified, first trimesterO09.92 Supervision of high risk pregnancy, unspecified, second trimesterO09.93 Supervision of high risk pregnancy, unspecified, third trimesterZ34 Encounter for supervision of normal pregnancy ("encounter for supervision of high risk pregnancy (O09.-)")Z3A Weeks of gestation ("obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)")O09.89 Supervision of other high risk pregnanciesO09.891 Supervision of other high risk pregnancies, first trimesterO09.892 Supervision of other high risk pregnancies, second trimesterO09.893 Supervision of other high risk pregnancies, third trimesterO09.899 Supervision of other high risk pregnancies, unspecified trimesterO09.9 Supervision of high risk pregnancy, unspecified (this code)O09.90 Supervision of high risk pregnancy, unspecified, unspecified trimesterO09.91 Supervision of high risk pregnancy, unspecified, first trimesterO09.92 Supervision of high risk pregnancy, unspecified, second trimesterO09.93 Supervision of high risk pregnancy, unspecified, third trimester