ICD-10-CM > O00-O9A > O30-O48 > O43 > O43.8 > O43.81 O43.81 Placental infarction Non-Billable/Non-Specific Codes O43.811Placental infarction, first trimesterO43.812Placental infarction, second trimesterO43.813Placental infarction, third trimesterO43.819Placental infarction, unspecified trimester