Dr. Luba was accepted into medical school immediately after high school graduation and completed a combined six-year undergraduate and medical school program at Boston University Medical School, where he received the Henry J. Bakst Award in Community Medicine. He did his Internship and Residency in Internal Medicine at Boston VA Medical Center in Boston, MA.

Dr. Luba then moved to California and completed a Fellowship in Gastroenterology at Stanford University Medical Center. He is Board Certified in Gastroenterology.  Dr. Luba is the managing partner of Gastroenterology Consultants Medical Group, Inc., Medical Director of the Monterey Bay Endoscopy Center, LLC, and President of the Monterey Bay GI Research Institute, Inc.  Reflecting his intense interest in genetic cancer syndromes, he founded Project DNA, and is actively involved in educating his physician colleagues around the Monterey Bay.

He is a Founding Director of the Monterey Bay Independent Physician Association.