Massachusetts General Hospital (Mass General or MGH or Man's Greatest Hospital) is the original and largest teaching hospital of Harvard Medical School and a biomedical research facility located in the West End neighborhood of Boston, Massachusetts. It is the third oldest general hospital in the United States and the oldest and largest hospital in New England with 950 beds. Massachusetts General Hospital conducts the largest hospital-based research program in the world, with an annual research budget of more than $750 million. It is currently ranked as the #2 hospital in the United States by U.S.