Capital Digestive Physician Syed Ismail M. Thiwan, MD

Syed Ismail M. Thiwan, MD


Dr. Syed Ismail Thiwan is a board-certified, fellowship-trained gastroenterologist. Dr. Thiwan provides dedicated care with a personal touch, following up on his patients, encouraging second opinions, accommodating urgent needs, and treating every patient with compassion.

He has particular interest in the following conditions and procedures:

  • Colon cancer screening
  • Colonoscopy
  • Irritable bowel syndrome (IBS)
  • Inflammatory bowel disease (IBD)

Dr. Thiwan completed his medical degree at Tirunelveli Medical College in India. He underwent residency training in the United States at Robert Wood Johnson Medical School, followed by a fellowship in internal medicine at East Carolina University and an additional fellowship in gastroenterology and hepatology at the University of North Carolina at Chapel Hill.

“I approach each patient as one would a unique puzzle, trying to solve their problems with empathy, respect, and an open mind. My approach is to partner with my patients on their treatment plans, providing options to help them make informed decisions. Ultimately, I want the best for all my patients,” Dr. Thiwan said.

When he is not at work, Dr. Thiwan likes to spend time with his wife and teenage daughter and joins his family in volunteering for social justice causes. He is passionate about traveling the world to experience different cultures, cuisine, and all that nature has to offer.


  • English
  • Tamil

Office Locations

Endoscopy Centers

Special Areas of Interest

  • Colon cancer screening
  • Colonoscopy
  • Irritable bowel syndrome (IBS)
  • Inflammatory bowel disease (IBD)



Medical Education

  • Tirunelveli Medical College / India / MBBS


  • Robert Wood Johnson Medical School / Brunswick, NJ


  • Internal Medicine / East Carolina University / Greenville, NC
  • Gastroenterology and Hepatology / University of North Carolina at Chapel Hill / Chapel Hill, NC


  • Internal Medicine

    American Board of Internal Medicine
  • Gastroenterology

    American Osteopathic Board of Internal Medicine