After completing medical school at the University of Michigan Medical School, he performed his residency at a hospital affiliated with the University of Michigan. Dr. Harness's clinical interests encompass breast cancer surgery. He has received a 5.0 out of 5 star rating by his patients. Dr. Harness takes Blue Cross/Blue Shield, Viant, and CIGNA Plans, in addition to other insurance carriers. Distinctions awarded to Dr. Harness include: Southern California Super Doctors and Southern California Super Doctors 2008. His professional affiliations include St. Joseph Heritage Medical Group, St. Joseph Hospital Affiliated Physicians (SJHAP), and St. Joseph Hospital (Orange, CA).