Dr. Frederick Klein founded Arizona Gastroenterology in 1980. He is board certified in internal medicine and gastroenterology, with clinical interests in gastrointestinal cancers and nutritional support.
Raised in Joliet, Illinois, Dr. Klein earned his medical degree from the University of Illinois. He completed his internship, residency and fellowship at Northwestern University Medical School in Chicago, where he was named Top Research Fellow in the Chicago area and wrote three NIH grants.
In Tucson, Dr. Klein chaired the steering committee for Northwest Hospital and served as its first chief of staff. He helped build nutritional support teams across the metro area and performed the first esophageal manometry and pH monitoring in adults and children in Tucson.
Dr. Klein enjoys antique cars, books, artifacts from the Spanish-American War, travel, and time with his three grandchildren.