Medical Mutual of Ohio (MMO) is an American mutual health insurance company. It is the oldest and largest health insurance company based in Ohio and serves more than 1.6 million customers. Employing 2,500 people, Medical Mutual is one of the biggest employers in downtown Cleveland.
Headquartered in Cleveland’s historic Rose Building, the company also has statewide offices in Cincinnati, Columbus, Dayton, Strongsville, and Toledo, as well as an information systems facility in Beachwood. In 2008, Medical Mutual of Ohio ranked 806 out of the top 1,000 corporations in America. – less