Directions to AdventHealth Medical Group Multispecialty at Winthrop AdventHealth Medical Group Multispecialty at Winthrop 6043 Winthrop Commerce Ave Suite 201 Riverview, FL 33578 Directions to AdventHealth Medical Group Multispecialty at Winthrop AdventHealth Medical Group Multispecialty at Winthrop 6043 Winthrop Commerce Ave Suite 201 Riverview, FL 33578 Call AdventHealth Medical Group Multispecialty at Winthrop at813-291-0629