St. James Mercy Health System, Hornell NY
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St. James Mercy Hospital


Photo of Dennis Blom

Dennis Blom, MD

460 Canisteo Street
Hornell, NY 14843
Phone: 607-324-4134


Colorectal Health
General Surgery

Medical School

  • Albany Medical College in Albany, NY


  • Surgical Residency, University of Rochester School of Medicine & Dentistry in Rochester, NY


  • Clinical fellowship at the University of Southern California in Los Angeles, CA

Professional Experience

  • Dr. Blom served in the United States Army Medical Corps, notably during Operation Enduring Freedom and Operation Iraqi Freedom.

Special Interests

  • Minimally invasive surgery
  • Gastrointestinal disease/surgery
  • Treatment of gastroesophageal reflux
  • Esophageal motility disorders
  • Esophageal/gastric cancer



St. James Mercy Hospital
411 Canisteo Street
Hornell, NY 14843
(607) 324-8000

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St. James Mercy Hospital is located in Hornell, NY, and serves Steuben County and the surrounding region.

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