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Excela Health

Our Surgeons and Team

The bariatric surgery team at Excela Health is committed to providing you with the best resources to achieve successful weight loss. During your weight loss journey, our multidisciplinary team of surgeons, nurses, exercise physiologists, registered dietitians and psychologists will be available to help you every step of the way.

Starting with your first visit, our team will help identify obstacles that may hamper your ability to achieve your optimal weight. They'll work with you to set realistic goals, provide you with the tools to be successful and give you the encouragement and support you need.

A bariatric community meeting and seminar schedule is available here.

View Dr.'s Bertin and Zelkovic's Web Chat on Weight Loss Surgery; 2011

View Dr.'s Bertin and Zelkovic's Web Chat on Weight Loss Surgery; 2013

Peter Bertin, DO

Dr. Bertin is a board certified general and bariatric surgeon. He attended the Ohio University College of Osteopathic Medicine and completed a general surgery residency at the Henry Ford Hospital, Macomb-Warren campus, Warren, Mich.  He is fellowship trained in minimally invasive surgery including bariatric surgery, endoscopy and ultrasound from St. Vincent Hospital, Indiana University, Indianapolis.




James J. Longhi, DO, FACS

Dr. Longhi is a board certified general and bariatric surgeon.  He attended medical school at the West Virginia School of Osteopathic Medicine in Lewisburg, W. Va.  He completed an osteopathic internship and a general surgery residency at the West Virginia University Hospitals, Morgantown.  Dr. Longhi completed a fellowship at the Penn State Hershey Medical Center, Hershey, Pa. and specializes in minimally invasive prodecures, robotic and bariatric surgery.


Mark A. Zelkovic, MD

Dr. Zelkovic is a board certified general surgeon and bariatric surgeon. He attended medical school at the Jefferson Medical College of the Thomas Jefferson University, Philadelphia. He completed a surgical internship and residency at Healtheast Teaching Hospitals, Lehigh Valley Hospitals, Allentown, Pa. He received additional training in laparoscopic adjustable banding at New York University and completed a preceptorship in laparoscopic bariatrics at St. Margaret’s Hospital, Pittsburgh.




The Excela Health Bariatric Surgery Center is an
MBSAQIP Accredited Center – Comprehensive.



Additional Resources

Find A Physician

Dr. Zelkovic discusses bariatric
surgery options.

Excela Health
Administrative Offices
532 West Pittsburgh Street
Greensburg, PA, 15601