ICD-10-CM > O00-O9A > O30-O48 > O41 > O41.1 > O41.10 > O41.101 O41.101 Infection of amniotic sac and membranes, unspecified, first trimester Non-Billable/Non-Specific Codes O41.1010..., not applicable or unspecifiedO41.1011..., fetus 1O41.1012..., fetus 2O41.1013..., fetus 3O41.1014..., fetus 4O41.1015..., fetus 5O41.1019..., other fetus