ICD-10-CM > O00-O9A > O30-O48 > O41 > O41.1 > O41.10 O41.10 Infection of amniotic sac and membranes, unspecified Non-Billable/Non-Specific Codes O41.101Infection of amniotic sac and membranes, unspecified, first trimesterO41.1010..., not applicable or unspecifiedO41.1011..., fetus 1O41.1012..., fetus 2O41.1013..., fetus 3O41.1014..., fetus 4O41.1015..., fetus 5O41.1019..., other fetusO41.102Infection of amniotic sac and membranes, unspecified, second trimesterO41.1020..., not applicable or unspecifiedO41.1021..., fetus 1O41.1022..., fetus 2O41.1023..., fetus 3O41.1024..., fetus 4O41.1025..., fetus 5O41.1029..., other fetusO41.103Infection of amniotic sac and membranes, unspecified, third trimesterO41.1030..., not applicable or unspecifiedO41.1031..., fetus 1O41.1032..., fetus 2O41.1033..., fetus 3O41.1034..., fetus 4O41.1035..., fetus 5O41.1039..., other fetusO41.109Infection of amniotic sac and membranes, unspecified, unspecified trimesterO41.1090..., not applicable or unspecifiedO41.1091..., fetus 1O41.1092..., fetus 2O41.1093..., fetus 3O41.1094..., fetus 4O41.1095..., fetus 5O41.1099..., other fetus