| MGCRB | Medicare Geographic Classification Review Board |
|---|---|
| MIG | measles immune globulin; Medicare Insured Groups |
| MQIS | Medicare quality indicator system |
| MSS | Marshall-Smith syndrome; massage; Medical Superintendents' Society; Medicare Statistical System; men... |
| MTS | Medicare transaction system; magnetization transfer contrast; methotrexate; multicellular tumor sphe... |