Johnston County, Oklahoma. Johnston County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 10,957. Its county seat is Tishomingo. It was established at statehood on November 16, 1907 and named for Douglas H. Johnston, a governor of the Chickasaw Nation. Johnston County is part of the Texoma Region.
Texas Health Physicians Group is a group practice with 219 locations. Currently, Texas Health Physicians Group's 720 physicians cover 56 specialty areas of medicine.
As we expand and shape the future of healthcare in the Texoma region, you can count on TMC to deliver quality healthcare.â Ron Seal, CEO, Texoma Medical Center is owned and operated by a subsidiary of Universal Health Services, Inc. (UHS), a King of Prussia, PA-based company, that is one of the largest healthcare management companies in the nation. The information on this website is provided as general health guidelines and may not be applicable to your particular health condition.