MMR Titer Test Measles, Mumps, Rubella, MMR Antibodies, MMR Titer Test Code: 058495 Specimen Type: Blood Description: MMR Titer Test (Labcorp) What is an MMR Immunity Test? The MMR Titer test measures IgG antibodies to Measles (Rubeola), Mumps, and Rubella. Measuring antibody levels ca...