ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.6 > O36.63 O36.63 Maternal care for excessive fetal growth, third trimester Non-Billable/Non-Specific Codes O36.63X0..., not applicable or unspecifiedO36.63X1..., fetus 1O36.63X2..., fetus 2O36.63X3..., fetus 3O36.63X4..., fetus 4O36.63X5..., fetus 5O36.63X9..., other fetus