ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.7 > O36.71 O36.71 Maternal care for viable fetus in abdominal pregnancy, first trimester Non-Billable/Non-Specific Codes O36.71X0..., not applicable or unspecifiedO36.71X1..., fetus 1O36.71X2..., fetus 2O36.71X3..., fetus 3O36.71X4..., fetus 4O36.71X5..., fetus 5O36.71X9..., other fetus