About Five Oaks Medical Group. Five Oaks Medical Group is a group practice with 1 location. ... Five Oaks Medical Group Office Locations. Five Oaks Medical Group. 2100 W Iowa Ave Chickasha, OK 73018 (405) 224-2100. Monday : 8:00 AM - 5:00 PM: ... Closed: Office Information. Fax: Not Available. Practice Website: www.gradymem.org. Accepting New ....