ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.1 > O36.11 > O36.112 O36.112 Maternal care for Anti-A sensitization, second trimester Non-Billable/Non-Specific Codes O36.1120..., not applicable or unspecifiedO36.1121..., fetus 1O36.1122..., fetus 2O36.1123..., fetus 3O36.1124..., fetus 4O36.1125..., fetus 5O36.1129..., other fetus