Great Salt Plains Health Center 405 S. Oklahoma Ave Cherokee, OK 580-596-2800 www.gsphealth.org. GSPHC - Enid 231 S. 30th St Enid, OK 580-233-2900. GSPHC - Canton 310 E Walnut Canton, OK 580-886-2200. GSPHC - Medford 619 N Front St Medford, OK 580-395-3200.