ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.5 > O36.51 > O36.512 O36.512 Maternal care for known or suspected placental insufficiency, second trimester Non-Billable/Non-Specific Codes O36.5120..., not applicable or unspecifiedO36.5121..., fetus 1O36.5122..., fetus 2O36.5123..., fetus 3O36.5124..., fetus 4O36.5125..., fetus 5O36.5129..., other fetus