ICD-10-CM > O00-O9A > O30-O48 > O30 > O30.0 > O30.04 O30.04 Twin pregnancy, dichorionic/diamniotic Non-Billable/Non-Specific Applicable To Twin pregnancy, two placentae, two amniotic sacs Codes O30.041Twin pregnancy, dichorionic/diamniotic, first trimesterO30.042Twin pregnancy, dichorionic/diamniotic, second trimesterO30.043Twin pregnancy, dichorionic/diamniotic, third trimesterO30.049Twin pregnancy, dichorionic/diamniotic, unspecified trimester