ICD 10 CM Codes

O36.831 Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester
O36.832 Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester
O36.833 Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester
O36.839 Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester