Overland Park Chiropractor. Dr. Robert Nab, D.C. provides Headache, Back Pain, Neck Pain, Auto Injury, Sports Injury, Whiplash, Physical Therapy, back pain relief, neck pain relief to the following locations: Kansas City, Lenexa, Olathe. Kansas City Chiropractor providing Headache, Back Pain, Neck Pain, Auto Injury, Sports Injury, Whiplash, Physical Therapy in Overland Park, Kansas City, Lenexa, Olathe, Kansas.