An excellent,experienced surgeon. Using state of the art equipment and his percise skill level relieves and alleviates severe pain debilitating spine injurys/disease.Dedicated to help his patients have quality of life. Rated #1 of all Spine experts.This surgeon has the.most outstanding follow-up care as well, always available as needed and as long as you need as well.This is obsolete with other surgeons they operate then refer you elsewhere. Dr.Chang truley stands above the rest.