About Peter Fagenholz, MD

Dr. Fagenholz graduated from the New York University School of Medicine in 2002.  While there he worked in the Laboratory of Developmental Biology and Repair under Dr. Michael Longaker performing studies on the molecular biology of wound healing and cranial suture fusion. From 2002-2005 he served as a resident in general surgery at the Massachusetts General Hospital.  From 2005-2007 he was a research fellow in the Department of Surgery at MGH studying the epidemiology of surgical diseases such as pancreatitis and burn injury as well as the physiology of hypoxia and high altitude illness.  His high altitude work led him to Nepal where he performed field work in the Khumbu Valley and met his wife Alice, an emergency medicine physician.  Dr. Fagenholz then returned to the MGH, completing his residency in General Surgery in 2009.

In 2009-20010 he moved to Edinburgh, Scotland where he worked as a Specialist Doctor in Cardiothoracic Surgery at the Edinburgh Royal Infirmary.  In 2010 he returned to Boston to complete a fellowship in surgical critical care at the MGH before joining the staff in the Division of Trauma, Emergency Surgery, and Critical Care.  Dr. Fagenholz is board certified in Surgery and Surgical Critical Care and is now an Assistant professor of Surgery at Harvard Medical School and an Associate Program Director of the MGH General Surgery Residency.

Dr. Fagenholz practices a broad range of general and trauma surgery and provides critical care in MGH's Surgical Intensive Care Units.  He has expertise in surgery for acute pancreatitis and especially minimally invasive necrosectomy and has published significantly on the topic and contributed to current international guidelines.  He also has a special interest in complex abdominal wall reconstruction.


Departments, Centers, & Programs:

Clinical Interests:



Mass General Surgery
55 Fruit St.
White Building
Suite 506
Boston, MA 02114
Phone: 617-726-2760

Medical Education

  • MD, New York University School of Medicine
  • Residency, Massachusetts General Hospital
  • Residency, Massachusetts General Hospital
  • Fellowship, Massachusetts General Hospital
  • Fellowship, Massachusetts General Hospital

American Board Certifications

  • General Surgery, American Board of Surgery
  • Surgical Critical Care, American Board of Surgery

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


Dr. Fagenholz currently performs clinical research on surgical therapies for pancreatitis and treatment of complicated intra-abdominal infections such as appendicitis, cholecystitis, and Clostridium difficile colitis.


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