ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.7 > O36.73 O36.73 Maternal care for viable fetus in abdominal pregnancy, third trimester Non-Billable/Non-Specific Codes O36.73X0..., not applicable or unspecifiedO36.73X1..., fetus 1O36.73X2..., fetus 2O36.73X3..., fetus 3O36.73X4..., fetus 4O36.73X5..., fetus 5O36.73X9..., other fetus