Dr. John Mongan earned his medical degree from the Philadelphia College of Osteopathic Medicine. He completed his internship and residency at Dartmouth-Hitchcock Medical Center, and his fellowship at the University of Rochester Medical Center. Dr. Mongan is board certified by the American Board of Internal Medicine with subspecialty certification in medical oncology and hematology. He sees patients at Saratoga Hematology/Oncology, a service of Glens Falls Hospital.