ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.5 > O36.59 > O36.593 O36.593 Maternal care for other known or suspected poor fetal growth, third trimester Non-Billable/Non-Specific Codes O36.5930..., not applicable or unspecifiedO36.5931..., fetus 1O36.5932..., fetus 2O36.5933..., fetus 3O36.5934..., fetus 4O36.5935..., fetus 5O36.5939..., other fetus