Primary Care Group, a Medical Group Practice located in Harrisburg, IL. ... Primary Care Group. 117 E Clark St Harrisburg, IL 62946 (618) 252-8625. Not Available. Office Information. Fax: (618) 252-2540. Practice Website: Not Available. Accepting New Patients: No. Medicare Accepted: No. Medicaid Accepted: No. Physicians at this location. Larry ....