Cox Barton County Emergency Department Address 29 NW 1st Lane Lamar, MO 64759 location Get Directions Phone: 417-681-5100 Hours 24 hours a day, 7 days a week About Cox Barton County Hospital's emergency team cares for more than 6,000 patients each year. We provide critical care during life-threatening emergencies, treating heart attacks, broken bones, accidental injuries, and more. Our critical care transfer team provides stabilizing care and rapid transfer by ambulance or helicopter for those who require specialized care.