MedStar Union Memorial Hospital is a non-profit, acute care teaching hospital located in the North Central section of Baltimore, Maryland.

The hospital is a member of MedStar Health, a community-based network of Baltimore/Washington, D.C. area hospitals and other health care services.

In 2014, the magazine U.S. News & World Report ranked the hospital 10th in Maryland, and 9th in the Baltimore metropolitan area.

In 1939, the gangster Al Capone spent time at the hospital to cure his paresis caused by syphilis, after his release from Alcatraz, after which he donated two cherry trees to the hospital.

[3] One tree was later cut down to allow the construction of a new wing of the hospital.