Advanced Endoscopy Fellowship Program


The Advanced Endoscopy fellowship program at Stony Brook University Hospital was started in 2013. This unique program offers an additional year of training following a traditional 3-year gastroenterology fellowship. As the major referral center in Suffolk County Long Island, rigorous and comprehensive training is offered in endoscopic retrograde cholangiopancreatography (ERCP) with cholangioscopy and pancreatoscopy, diagnostic and therapeutic endoscopic ultrasound (EUS), enteral stent placement, techniques of mucosal ablation (e.g. radiofrequency ablation, cryoablation), endoscopic mucosal resection (EMR), endoscopic suturing and exposure to surgical endoscopy (POEM, ESD). In total, over 2,000 advanced endoscopic procedures performed annually at Stony Brook. In addition, 4th year fellows in advanced endoscopy are encouraged to participate in one of several clinical endoscopic research studies during their training, as well as the teaching of basic endoscopic skills to general gastroenterology fellows.

The Advanced Endoscopy fellowship program is directed by Lionel S. D’Souza, MD. Dr. D’Souza completed his advanced endoscopy training at the Beth Israel Medical Center and the Mount Sinai Hospital and specializes in third-space endoscopy and endoscopic surgery. Additional faculty members include Jonathan Buscaglia, MD, FASGE, AGAF who completed his advanced endoscopy training at the Johns Hopkins Hospital and specializes in the management of pancreatic and biliary diseases and in the management of Barrett esophagus. Asim Khokhar, MD completed his advanced endoscopy training at the Memorial Sloan Kettering Cancer Center and specializes in the management of pancreaticobiliary disease and double balloon enteroscopy. Meera P. Bhardwaj, MD completed her advanced endoscopy training at Montefiore Medical Center/Albert Einstein College of Medicine and specializes in the management of pancreaticobiliary disease and double balloon enteroscopy.

Interested candidates applying to the program are encouraged to do so through the American Society for Gastrointestinal Endoscopy (ASGE) website, under the AEF Match Programs.

Current Fellow


Umer Ejaz Malik, MD
Medical School - Nishtar Medical College
Residency - Texas Tech University
Fellowship - Albany Medical Center

Past Fellows

Yonatan Hillman MD 2022-2023
Yonatan Hillman, MD
Medical School - Tufts University School of Medicine 
Residency - Icahn School of Medicine at Mount Sinai
Fellowship - Hofstra/Northwell (North Shore University Hospital & Long Island Jewish Medical Center)

Khwaja Haq, MD 2021-2022
Khwaja F. Haq, MD
Medical School: Dow Medical College
Residency: New York Medical College, Westchester Medical Center
Fellowship: Henry Ford Hospital, Wayne State University
Dr. Henry Jen 2020-2021
Henry Jen, MD
Medical School: Stony Brook University School of Medicine
Residency: Lenox Hill Hospital
Fellowship: Stony Brook University Hospital, Renaissance School of Medicine
2019 - 2020 
Vineet Rolston, MD
Medical School: New York Medical College
Residency: Cedars-Sinai Medical Center
Fellowship: NYU Langone School of Medicine
2018 - 2019
Anan Said, MD
Medical School: Howard University
Residency: University of Maryland
Fellowship: University of Maryland
2017 - 2018 
Eduardo Quintero, MD
Medical School: San Juan Bautista
Residency: University of Florida, Tampa
Fellowship: Stony Brook University Hospital
2016 - 2017
Anoop Appannagari, MD
Medical School: Jefferson Medical College
Residency: University of Chicago
Fellowship: Loyola
2015 - 2016
Demetrios Tzimas, MD
Medical School: Albert Einstein
Residency: NYU
Fellowship: NYU 
2014 - 2015
Ryan Wong, MD
Medical School: Albert Einstein
Residency: Montefiore
Fellowship: Cook Country Health & Hospital Systems
2013 - 2014
Amar Thosani, MD
Medical School: New Jersey Medical School, UMDNJ
Residency: Montefiore
Fellowship: Montefiore