ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.5 > O36.59 > O36.592 O36.592 Maternal care for other known or suspected poor fetal growth, second trimester Non-Billable/Non-Specific Codes O36.5920..., not applicable or unspecifiedO36.5921..., fetus 1O36.5922..., fetus 2O36.5923..., fetus 3O36.5924..., fetus 4O36.5925..., fetus 5O36.5929..., other fetus