ICD-10-CM > O00-O9A > O94-O9A > O99 > O99.0 > O99.01 O99.01 Anemia complicating pregnancy Non-Billable/Non-Specific Codes O99.011Anemia complicating pregnancy, first trimesterO99.012Anemia complicating pregnancy, second trimesterO99.013Anemia complicating pregnancy, third trimesterO99.019Anemia complicating pregnancy, unspecified trimester