Our Obesity Surgery Team

NewYork-Presbyterian Hospital/
Columbia University Medical Center

Dr. Bessler Dr. Bessler
Obesity Surgery at NewYork-Presbyterian/Columbia is led by Dr. Marc Bessler.

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(212) 305-4000
NewYork-Presbyterian Hospital/
Weill Cornell Medical Center

Dr. Pomp Dr. Pomp
Obesity Surgery at NewYork-Presbyterian/Weill Cornell is led by Dr. Alfons Pomp.

Learn More (212) 746-5294
Marc Bessler, MD
Director, Center for Obesity Surgery
Site Director:
Minimial Access Surgery Center

Daniel G. Davis, DO
Assistant Professor of Surgery

William B. Inabnet, MD
Assistant Professor Department of Surgery

Beth Schrope, MD, PhD
Assistant Professor

Nurse Practitioner/Medical Director
Lorraine Olivero-Rivera, MS, CS, FNP

Principal Investigator, LABS
Paul Berk, MD

Research Coordinator
Amna Daud, MD, MPH

Nurse Practitioner
Dory Ferraro, MS, CS, ANP

Nancy Restuccia, MS, RD
Meredith Urban-Skuro, MS, RD

Physician Assistant
Janice Blok, PA

Patient Coordinator
Nancy Colgan

Office Manager
Maria Mandino

Administrative Assistants
Ivy Roman
Jasmin Valerio
Alfons Pomp, MD, FACS, FRCSC
Chief, Bariatric and Minimally Invasive Surgery
Director, Weill Cornell Weight Loss Surgery Program
Site Director, Minimal Access Surgery Program
NewYork-Presbyterian/Weill Cornell

Gregory F. Dakin, MD
Assistant Professor of Surgery

Weight Loss Physicians
Lou Aronne, MD
Jonathan Waitman, MD

Director of Research
Gladys Strain, PhD

Research Coordinator
Laura Young
Faith Ebel

Liz Goldenberg, MPH, RD, CDN
Jaimie Sherry, MS, RD, CDN

Physician Assistants
Alison Chamberlain, RPA-C
Diana Gee, RPA-C

Stephanie Levey, PhD

Practice Manager
Jeannette Kimmer

Patient Coordinator
Tatiana Londono

Medical Assistants
LaWanda Smiley, RMA
Evelyn Torres, RMA

Administrative Assistants
Erica Ballesta
Kimberly Wu
Michele Vega

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Columbia University College of Physicians and Surgeons Weill Medical College of Cornell University