ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.1 > O36.11 > O36.111 O36.111 Maternal care for Anti-A sensitization, first trimester Non-Billable/Non-Specific Codes O36.1110..., not applicable or unspecifiedO36.1111..., fetus 1O36.1112..., fetus 2O36.1113..., fetus 3O36.1114..., fetus 4O36.1115..., fetus 5O36.1119..., other fetus