Cox Hospital Springfield Mo Jobs Now Hiring. Health (9 days ago) Cox Medical Centers, also known as Lester E Cox Medical Centers, is a Psychiatric Hospital in Springfield, Missouri.The NPI Number for Cox Medical Centers is 1093740128. The current location address for Cox Medical Centers is 3801 S National Ave, , Springfield, Missouri and the contact number is 417-269-6000 and fax number is 417 ....