Dr. Pastor is a Clinical Instructor of Medicine at Harvard Medical School.

Dr. Pastor earned his medical degree from Tufts University School of Medicine. He completed his internship in internal medicine at Boston Medical Center, followed by a residency in internal medicine at Tufts Medical Center and a fellowship in gastroenterology at the Beth Israel Deaconess Medical Center.

He is board certified in internal medicine and gastroenterology by the American Board of Internal Medicine.

His clinical interest focuses on general gastroenterology.