The Martin Center Address 3901 S. Fremont Ave. Springfield, MO 65804 location Get Directions Phone: 417-269-1182 Hours The various services offered at The Martin Center are available at different times, Monday through Friday:MRIs: 6 a.m.–9:30 p.m.Nuclear medicine 7 a.m.–5 p.m.PET/CT: 7 a.m.–5 p.m.Ultrasound: 7 a.m.–5 p.m.X-rays: 7 a.m.–6:30 p.m.Labs: 7 a.m.–6:30 p.m.Endoscopy services: 7 a.m.–5 p.m. About The Martin Center provides a wide variety of outpatient radiology, gastroenterology and endoscopy services. The Martin Center is located on the southwest corner of south Fremont and east Independence in Springfield.