ICD-10-CM > O00-O9A > O09-O09 > O09 > O09.9 O09.9 Supervision of high risk pregnancy, unspecified Non-Billable/Non-Specific Codes O09.90Supervision of high risk pregnancy, unspecified, unspecified trimesterO09.91Supervision of high risk pregnancy, unspecified, first trimesterO09.92Supervision of high risk pregnancy, unspecified, second trimesterO09.93Supervision of high risk pregnancy, unspecified, third trimester