ICD-10-CM > O00-O9A > O30-O48 > O41 > O41.1 > O41.10 > O41.109 O41.109 Infection of amniotic sac and membranes, unspecified, unspecified trimester Non-Billable/Non-Specific Codes O41.1090..., not applicable or unspecifiedO41.1091..., fetus 1O41.1092..., fetus 2O41.1093..., fetus 3O41.1094..., fetus 4O41.1095..., fetus 5O41.1099..., other fetus