Dr. Alexander Brun, MD

Alexander Brun, MD

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Who is he?

Alexander Brun, MD, is a board-certified specialist in internal medicine and gastroenterology. He serves the communities of Brooklyn, Staten Island, and the Bronx, New York, at Triborough GI. Dr. Brun has completed and published extensive research in his field, utilizing this knowledge to better treat his patients. He frequently treats patients for irritable bowel syndrome, acid reflux disease, celiac disease, and general abdominal pain.

Dr. Brun has an extensive educational background in medicine. He earned his medical degree in 2005 at State University of New York Downstate Medical Center College of Medicine in Brooklyn. He then moved to East Garden City, New York, to complete his fellowship residency in gastroenterology at the acclaimed Hofstra North Shore-LIJ School of Medicine. Then, he completed a residency in internal medicine at Rutgers-Robert Wood Johnson Medical School in New Brunswick, New Jersey.

At Triborough GI, Dr. Brun uses top-of-the-line diagnostic tools and treatments to treat each of his patients. He ensures that they are confident in the care that they receive, taking the time to explain their conditions and the procedures that will most likely get them back to health. He is fluent in both English and Russian and has been recognized internationally for his research in gastrointestinal bleeding and neonatal gastroenterology.

Awards / Distinctions

  • Chief Administrative Gastroenterology Fellow
  • Outstanding Resident of the Year
  • Resident Teacher of the Year


  • Trindade AJ, Brun A, Vamadevan AS, Sideridis K, Sejpal DV, Mayo PH, Khanijo S, Koenig SJ. Use of bedside transabdominal US in facilitating emergent intensive care unit ERCP without fluoroscopy (with video). Gastrointest Endosc. 2014 Nov 18. pii: S0016-5107(14)02204-4. doi:10.1016/j.gie.2014.09.025.
  • Sultan K, Brun A, Spyropoulos AC. Venous Thromboembolism Risk in Patients With Inflammatory Bowel Disease: Defining the Benefits of Pharmacologic Prophylaxis. Clinical Gastroenterology and Hematology. 2014 Apr 1. pii: S1542-3565(14)00475-3.
  • Brun A, Pitchumoni CS, Biliary Diseases in HIV. Practical Gastroenterology. 2010 Sept; 36 (9): 24-32.
  • Brun A, Agarwal N, Pitchumoni CS. Fluid Collections in and Around the Pancreas. Journal of Clinical Gastroenterology. 2011 Aug; 45 (7): 614-625
  • Brun A, Gidwaney N, Pitchumoni CS. Prognosis in Acute Pancreatitis. Practical Gastroenterology 2012 Mar 36(3): 16-41
  • Pitchumoni C.S. and Brun A. (2012) Upper and Lower Gastrointestinal Bleeding. In C.S Pitchumoni, T. S. Dharmarajan (Eds), Geriatric Gastroenterology (pp.363-374). New York: Springer
  • Pitchumoni C.S. and Brun A. (2012) HIV Disease. In C.S Pitchumoni, T. S. Dharmarajan (Eds), Geriatric Gastroenterology (pp.659-666). New York: Springer
  • Research Project, North Shore-LIJ Hofstra School of Medicine Prospectively study to address issues of safety and effectiveness of pharmacologic venous thromboembolism prophylaxis in a study specifically of IBD patients.
    Status: IRB approval, Grant submitted to Crohn’s and Colitis Foundation of America
    Mentors: Keith Sultan MD, Alex Spyropoulus MD 06/07-09/07
  • Research Project, SUNY Downstate Examined the effect of prenatal cocaine exposure on the rat striatal size.
    Status: Complete, unpublished report
    Principal Investigator: Diana Dow-Edwards, PhD

About Dr. Alexander Brun


1672-1674 Sheepshead Bay Rd, Brooklyn, NY 11235


3594 E Tremont Ave #100, Bronx, NY 10465


2043 Richmond Ave, Staten Island, NY 10314





Board Certification:

American Board of Internal Medicine

Board Certification:

(Internal Medicine)

Medical School:

SUNY Downstate College of Medicine, Brooklyn, NY, Doctor of Medicine


Rutgers Robert Wood Johnson Medical School, Residency in Internal Medicine


North Shore-Long Island Jewish Health System, Fellowship in Gastroenterology


Mixed Martial Arts, Traveling


Fluent in Russian