ICD-10-CM > O00-O9A > O30-O48 > O41 > O41.8 > O41.8X > O41.8X3 O41.8X3 Other specified disorders of amniotic fluid and membranes, third trimester Non-Billable/Non-Specific Codes O41.8X30..., not applicable or unspecifiedO41.8X31..., fetus 1O41.8X32..., fetus 2O41.8X33..., fetus 3O41.8X34..., fetus 4O41.8X35..., fetus 5O41.8X39..., other fetus