ICD-10-CM > O00-O9A > O30-O48 > O45 > O45.9 O45.9 Premature separation of placenta, unspecified Non-Billable/Non-Specific Applicable To Abruptio placentae NOS Codes O45.90Premature separation of placenta, unspecified, unspecified trimesterO45.91Premature separation of placenta, unspecified, first trimesterO45.92Premature separation of placenta, unspecified, second trimesterO45.93Premature separation of placenta, unspecified, third trimester