Our Physicians

Joseph P. Tassoni, Jr., MDJoseph P. Tassoni, Jr., MD

Dr. Tassoni earned his medical degree at Cornell University Medical College. He completed his internal medicine residency at the New York Hospital-Cornell Medical Center in New York, and he completed his gastroenterology fellowship at New England Medical Center Hospital in Boston.

Dr. Tassoni is board certified in gastroenterology and internal medicine. He has been practicing gastroenterology since 1990. He was previously chairman and director of medicine at St. Luke’s Hospital in New Bedford.


David A. Berkman, MDDavid A. Berkman, MD

Dr. Berkman is board certified in gastroenterology and internal medicine. He earned his medical degree at Cornell University Medical College in New York. He then completed his internship and residency in internal medicine at The New York Hospital, Cornell Medical Center, and he completed a clinical fellowship in gastroenterology and hepatology at Montefiore Medical Center Albert Einstein College of Medicine in New York.

Dr. Berkman has been in practice in Northampton since 1995.


Dr. David KalmanDavid R. Kalman, MD

Dr. Kalman obtained his undergraduate degree from Cornell University with Honors, and graduated Medical School from Upstate Medical University in Syracuse NY. He completed his Internal Medicine Residency and Gastroenterology Fellowship at the University of Massachusetts in Worcester.

Dr. Kalman practiced at Springfield Medical Associates for 17 years and was its past President. His practice included all aspects of Gastroenterology, Liver Disease, and Biliary Disorders, incluiding ERCP. He has served on numerous physician organization boards.


Dr. Michal GanzMichal Ganz, MD

Dr. Michal Ganz is excited to return home to Western Massachusetts to the community where she grew up and graduated from the Amherst school system (elementary through high school). Dr. Ganz completed her undergraduate studies at the Massachusetts Institute of Technology (MIT) where was elected to Phi Beta Kappa as a junior. She earned a Masters Degree in Toxicology from MIT prior to completing medical school at the University of Massachusetts Medical School. She completed an internal medicine residency research pathway at UMass in which she studied the immune and inflammatory pathways of non-alcoholic fatty liver disease. She had numerous publications and won numerous awards for her work. Dr. Ganz then completed her gastroenterology fellowship at Brown University where she also had a special focus on women’s health. She treats all aspects of GI and liver disease.