ICD-10-CM > O00-O9A > O30-O48 > O43 > O43.0 O43.0 Placental transfusion syndromes Non-Billable/Non-Specific Codes O43.01Fetomaternal placental transfusion syndromeO43.011Fetomaternal placental transfusion syndrome, first trimesterO43.012Fetomaternal placental transfusion syndrome, second trimesterO43.013Fetomaternal placental transfusion syndrome, third trimesterO43.019Fetomaternal placental transfusion syndrome, unspecified trimesterO43.02Fetus-to-fetus placental transfusion syndromeO43.021Fetus-to-fetus placental transfusion syndrome, first trimesterO43.022Fetus-to-fetus placental transfusion syndrome, second trimesterO43.023Fetus-to-fetus placental transfusion syndrome, third trimesterO43.029Fetus-to-fetus placental transfusion syndrome, unspecified trimester