Board Certifications

  • Gastroenterology
  • Internal Medicine

Areas of Expertise

  • Dysphagia
  • Irritable Bowel Syndrome
  • Reflux



National Naval Medical Center
Bethesda, MD

Internship and Residency

Henry Ford Hospital – Wayne State University
Internal Medicine
Detroit, MI
1976 and 1978

Medical School

Georgetown University School of Medicine
Doctor of Medicine
Washington, D.C.

Undergraduate School

Columbia University
Bachelor of Science
New York, NY

Hospitals Affiliated With

Inova Fair Oaks Hospital
Reston Hospital Center

Professional Association

American Gastroenterological Association (AGA)
2009 – Present


“Colonoscopy and colorectal cancer screening in adults with intellectual and developmental disabilities: Review of a Series of Cases and Recommendations for Examination.” Journal of Intellectual and Developmental Disability (2012): Fischer, L. S., Becker, A., Paraguya, M., Chukwu, C.

“Water exchange method for colonoscopy: learning curve of an experienced colonoscopist in a US community practice setting.” Journal of Interventional Gastroenterology (2012): Fischer, L.S., Lumsden, A., Leung, F.W.

“High Rate of Colonoscopy Preparation Failure in Intellectually Disabled, Developmentally Disabled Adults in a State Residential Institution.” American Journal of Gastroenterology (2010): Fischer, L.S., Paraguya, M., Chukwu, C., Becker, A.

Leadership Positions

Northern Virginia Training Center
Gastroenterology Consultant

Inova Fair Oaks Hospital
Former Chairman of the Department of Medicine and Chief of the Gastroenterology Division


Dr. Fischer received an undergraduate degree from Columbia University in New York City in 1971 and a medical degree from Georgetown University in 1975. He performed his residency training in Internal Medicine at Henry Ford Hospital in Detroit, Michigan. He completed his Gastroenterology fellowship training at the National Naval Medical Center in Bethesda, Maryland in 1982. His interests include functional disorders of the digestive tract, including dysphagia, reflux, and irritable bowel syndrome. He has served as Chairman of the Department of Medicine and Chief of the Gastroenterology Division at INOVA Fair Oaks Hospital and has been a Gastroenterology consultant to the Northern Virginia Training Center for more than two decades. He currently resides in Great Falls, VA with his wife, Felicitas, and daughter Tosca.