ICD-10-CM > O00-O9A > O30-O48 > O43 > O43.1 > O43.19 O43.19 Other malformation of placenta Non-Billable/Non-Specific Codes O43.191Other malformation of placenta, first trimesterO43.192Other malformation of placenta, second trimesterO43.193Other malformation of placenta, third trimesterO43.199Other malformation of placenta, unspecified trimester