The brief descriptions below are designed to familiarize you with our staff's training, professional credentials and work experience.
A. Sidney Barritt, MD, FACP
Dr. Barritt received his Bachelor of Arts degree from the College of Holy Cross and graduated from Cornell University Medical College. He completed his residency in Internal Medicine at the University of Virginia and obtained fellowship training in gastroenterology at the Medical College of Virginia.
Dr. Barritt is board certified in Internal Medicine and Gastroenterology and was recognized for Advanced Achievement in Internal Medicine in 1987. Prior to joining Gastroenterology Consultants of Southwest Virginia in 2000, Dr. Barritt served as Chief of Gastroenterology at the Salem Veterans Administration Medical Center from 1975 to 2000.
Vishal Bhagat, MD
Dr. Bhagat was born in India, where he finished his medical education and Internal Medicine residency at Gujarat University in Ahmedabad. He emigrated to the United States in 2003 and completed another residency in Internal Medicine at the State University of New York in Buffalo, serving an additional year as Chief Resident in Medicine. He subsequently completed additional studies in Liver Disease and Transplantation at the University of Miami before returning to SUNY Buffalo for his fellowship in gastroenterology.
Dr. Bhagat is board certified in Gastroenterology and Hepatology. He joined Gastroenterology Consultants of Southwest Virgina in October, 2010. He is particularly interested in colon cancer prevention, liver diseases, and inflammatory bowel diseases.
Michael Lee, DO
Dr. Lee received a B.A. in biology from West Virginia University in Morgantown, West Virginia. He received a D.O. (Doctor of Osteopathic Medicine) from West Virginia School of Osteopathic Medicine.
Dr. Lee completed a Rotating Internship at Community General Osteopathic Hospital in Harrisburg, Pennsylvania a three year Internal Medicine Residency at Allegheny General Hospital in Pittsburgh, Pennsylvania and a Gastroenterology Fellowship at Allegheny General Hospital.
Dr. Lee joined Gastroenterology Consultants of Southwest Virginia on July 1, 2007 and resides in Roanoke with his family.
R. Lee Meyers, III, MD, FACG
Dr. Meyers received a B. A. from Haverford College in Haverford, Pennsylvania. He completed medical school at University of Maryland Medical School in Baltimore, Maryland.
His internship and residency were completed at University of North Carolina Medical School in Chapel Hill North Carolina. Dr. Meyers completed a Fellowship in Liver Disease and a Fellowship in Digestive Diseases at University of North Carolina Medical School. His final year of Fellowship was spent in extensive training in therapeutic biliary endoscopy. He also functioned as an attending physician on consultation service and in the Endoscopy Unit.
He is Board Certified by the American Board of Internal Medicine Gastroenterology.
Dr. Meyer’s joined Gastroenterology Consultants of Southwest Virginia in August, 1995
and he resides in Roanoke with his family.
Donald G. Seibert, MD, FACG
Dr. Seibert obtained his bachelor's degree from Bucknell University and completed medical studies at George Washington University. He then completed Internal Medicine residency, including a year as Chief Resident, at Mercy Hospital in Baltimore, MD. He completed his fellowship in Gastroenterology and Hepatology at West Virginia University where he remained on the faculty, attaining the rank of full professor.
Dr. Seibert joined Gastroenterology Consultants of Southwest Virginia in 2002. He is especially interested in swallowing disorders and therapeutic endoscopy, including removal of large polyps.
Residing with his family in Roanoke County, Dr. Seibert enjoys hiking, bicycling, and both downhill and crosscountry skiing.
Dennis B. Weiserbs, MD, FACG
Dr. Weiserbs grew up in the Northeast and attended the University of Pennsylvania in Philadelphia for both his undergraduate and medical degrees. He obtained additional training in Internal Medicine and Gastroenterology/Hepatology at Virginia Commonwealth University/Medical College of Virginia, where he later served on the medical school faculty. In 1987, Dr. Weiserbs moved to Roanoke and established Gastroenterology Consultants of Southwest Virginia with Dr. John Morgan.
Dr. Weiserbs has appointments as Clinical Associate Professor of Medicine at the University of Virginia and Virginia Tech-Carilion Medical School. He is board certified in Internal Medicine and Gastroenterology.
Dr. Weiserbs serves as the Medical Director of the Endoscopy Center of Southwest Virginia.. He is particularly interested in colorectal cancer prevention, inflammatory bowel disease, and therapeutic endoscopy.
Nirish S. Shah, MD
Dr. Shah received his medical degree from BJ Medical College, Gujarat University in Ahmedabad, India in December, 2001. He completed a Medical Residency between July 2002 and June 2005 in Internal Medicine at Harbor Hospital in Baltimore, Maryland and was Chief Resident from July, 2004 thru June, 2005. Dr. Shah completed a Fellowship Program in June 2011 at University of Maryland, Baltimore, Maryland.
Dr. Shah completed Board Certification in Internal Medicine in 2005 and was certified in Gastroenterology by the American Board of Internal Medicine in 2012. He received training in advanced endoscopy at the Asian Institute of Gastroenterology in Hyderabad, India
Dr. Shah joined Gastroenterology Consultants of Southwest Virginia in February, 2014 and resides in Roanoke, Virginia with his family.
Megan C. McDonald, PA-C
Megan McDonald, PA-C completed a Bachelors of Science Degree at Roanoke College in Salem, Virginia where she was listed on the Faculty List of Distinguished Students, Who's Who Among Students in American Universities and Colleges and was the recipient of multiple scholarships.
Megan received a Bachelors of Science in Physician Assistant studies at Jefferson College of Health Sciences in Roanoke, Virginia where she was listed on the President's List and was a member of the American Association of Physician Assistants and Virginia Association of Physician Assistants. She has completed Certification as a Physician Assistant.
Megan joined Gastroenterology Consultants of Southwest Virginia in November, 2008 and resides in the Roanoke region with her family.