Surgical Services

Our Staff

Spencer E. Amory, MD, FACS
Clinical Professor of Surgery, Columbia University College of Physicians and Surgeons

Dr. Amory, Chief of the Division of General Surgery at NewYork-Presbyterian Hospital/Columbia University Medical Center, received his medical training from Johns Hopkins and Columbia Universities. He developed techniques in laparoscopic cholecystectomy that enabled his group to have the lowest open cholecystectomy rates in the state. In addition, Dr. Amory has earned a reputation for his diagnostic acumen in complex surgical problems and fir highly individualized and personalized care. In 2007, he received Columbia's Leonard Tow award for humanism in medicine.

Allen B. Chefitz, MD
Assistant Clinical Professor of Surgery Columbia University College of Physicians and Surgeons

Dr. Chefitz is a Board-certified surgeon, specializing in laparoscopic surgery and the use of biomaterials, with interests in hernia and breast research. He received his surgical training from Montefiore Medical Center / Albert Einstein College of Medicine and his medical training from the University of Massachusetts Medical School in Worchester. He also has extensive experience in surgical quality assurance.

Arpan Goel, MD
Bariatric and General Surgery

Dr. Goel completed his medical degree and internship in India, followed by residencies in West Virginia and Albert Einstein College of Medicine, Montefiore Medical Center. He completed his first fellowship at the Department of Plastic Surgery/Burn at Jacobi Medical Center, Bronx, and a second fellowship at Beth Israel Deaconess Medical Center, Boston, in minimally invasive and bariatric surgery.

His appointments prior to arriving at Columbia include Attending Surgeon at WestMed Medical Group and at Harlem Hospital Center. Dr. Goel received the 2014 Attending Teaching Award at Harlem Hospital Center, and was named Outstanding Resident Teacher three years in a row at Montefiore Medical Center (2005 – 2007). Dr. Goel has a special interest in abdominal wall hernia repair and bowel wall reconstruction.

Emmanouil Pappou, MD
Colorectal Surgery

Dr. Pappou completed his General Surgery residency training at the Johns Hopkins Hospital in 2014, with a Research Fellowship in Surgical Oncology at the Sidney Kimmel Comprehensive Cancer Center (Johns Hopkins). He has completed a Clinical Fellowship in Colon and Rectal Surgery at NewYork-Presbyterian/Weill Cornell and the Memorial Sloan Kettering Cancer Center in 2015.

Dr. Pappou has been the recipient of numerous prestigious awards, including the Johns Hopkins George D. Zuidema Research Award for Meritorious Laboratory Research for work on novel chemotherapy treatments in colorectal cancer.

A native of Greece, Dr. Pappou graduated from the Medical School of the Technical University of Munich with honors in 2006 and completed a Ph.D. on human stem cells at the research laboratory of the Ludwig Maximilian University of Munich, Germany.

Miguel Silva, MD, FACS
Director, Center for Advanced Surgery at NewYork-Presbyterian/Lawrence Hospital
Assistant Clinical Professor of Surgery, Columbia University College of Physicians and Surgeons

Dr. Silva specializes in minimally invasive bariatric surgery. He is known as one of the early adopters of the gastric sleeve technique and is among the most experienced surgeons in the New York area in Laparoscopic Sleeve Gastrectomies. He received advanced training in laparoscopic surgery at Baptist Hospital in Miami, FL and received his medical training at Albert Einstein College of Medicine / Montefiore Medical Center, Mount Sinai School of Medicine and University of Medicine and Dentistry of New Jersey / Robert Wood Johnson.


Gary Tannenbaum, MD, RVT, FACS
Vascular Surgery

Vascular surgeon Gary Tannenbaum, is proficient in both open and endovascular techniques. In his practice at NYP/Lawrence Hospital, he provides the full range of procedures for carotid artery disease, aortic aneurysm, lower arterial disease, dialysis access, and cosmetic vascular procedures. His most recent research involves drug therapies for lower extremity vascular disease. He completed his medical, residency and research fellowship training at Columbia.