ICD-10-CM > O00-O9A > O30-O48 > O41 > O41.8 > O41.8X > O41.8X1 O41.8X1 Other specified disorders of amniotic fluid and membranes, first trimester Non-Billable/Non-Specific Codes O41.8X10..., not applicable or unspecifiedO41.8X11..., fetus 1O41.8X12..., fetus 2O41.8X13..., fetus 3O41.8X14..., fetus 4O41.8X15..., fetus 5O41.8X19..., other fetus