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Meet Dr. Lyday

Dr. William Lyday

Physicians go back many generations in Dr. William Lyday’s family, so you could say it’s a hereditary trait. His great grandfather and grandfather were Internal Medicine and OB doctors in rural North Carolina, his dad a thoracic surgeon, and he’s the first gastroenterologist.

After completing his undergrad degree at UGA, Dr. Lyday went back to North Carolina for med school at UNC Chapel Hill with the intention of becoming a surgeon.

A problem-solver by nature, he soon discovered his love of figuring things out made him a better fit for an investigative, diagnostic, patient-centered role. With its connection to all the major systems in the body, gastroenterology was the perfect area of specialization.

Following his fellowship and residency, he soon found himself back in Georgia, highly interested in all the new technology being introduced in the Atlanta area. Since the early 2000s, Dr. Lyday’s been practicing in the GI field with a focus on nutrition, research, and innovative procedures.

He started Gastroenterology Atlanta, LLC in 2017 in order to create a practice where the medical team could focus on three things:

Being thorough

Looking at root causes and underlying factors to uncover the sources of GI issues.

Being comprehensive

Addressing problems from all angles, including heredity, diet/nutrition, and mental health.

Being collaborative

Building teams of experts to provide integrated care.

Dr. Lyday is board certified in Gastroenterology. Over the years, he’s enjoyed many affiliations, including with Atlanta Health Institute, Atlanta Community Clinical Oncology Program, Georgia Institute of Technology, and Cancer Treatment Centers of America. He’s currently affiliated with Emory St. Joseph’s Hospital, Northside, and Piedmont Hospitals.

When he’s not working, he enjoys fitness, golfing, and comedy clubs. (Sometimes laughter is the best medicine!)

Dr. Lyday’s Professional Distinctions


M.D. University of North Carolina, Chapel Hill, NC

B.S. University of Georgia, Athens, GA

Post Graduate Training

Fellowship: Gastroenterology – University of Nebraska Medical Center, Omaha, NE

Internal Medicine Residency – University of North Carolina – Carolinas Medical Center, Charlotte, NC

Licensure and Certification

2001-Present:  Medical License – State of Georgia: Physician and Surgeon

2012  Primary, Re-Certification in Gastroenterology – American Board of Internal Medicine

2001  Primary, Certification in Gastroenterology – American Board of Internal Medicine

2009  NIH Web Training, Protecting Human Subject Research Participants Certificate

1998  Secondary, Certification in Internal Medicine- American Board of Internal Medicine

Medical Experience

2017 – Present: Gastroenterology Atlanta, LLC

2015-2018 Gastroenterology & Nutrition Services, CTCA – Interventional Endoscopy – Perform ERCP, EUS, Enteral Stenting, Ablation, G tube placement

2012-2015 Director, Gastroenterology and Nutrition Services – Cancer Treatment Centers of America (CTCA) SE, Newnan Georgia

2008-2012 Director, Center for GI Health – Cancer Prevention, Management and Nutritional Therapy – A Division of Atlanta Gastro Associates, LLC

2001-2013 Physician/Partner – Atlanta Gastroenterology Associates, LLC


2010 Physician Investigator, National Cancer Institute

2002 Assistant Clinical Professor of Medicine, Emory University School of Medicine, Atlanta, GA

Institutional Affiliations

2017-present:  Emory Saint Joseph’s Hospital, Atlanta, GA

2012-2018  Cancer Treatment Centers of America

2010-2013 Atlanta Community Clinical Oncology Program

2007-2009 Medical Director – Atlanta Health Institute, LLC – Medical Nutrition and Bariatrics Provider 

Research, Presentations, Organizations

Research – Primary Investigator

2010-2012 Esophageal Cancer Prevention Study – molecular analysis of Barrett’s esophagus and esophageal cancer

2010-2012 Spectroscopic Evaluation of Barrett’s esophagus, Guided Therapeutics

2007-2013 BARRX Medical Registry – efficacy of endoscopic radiofrequency device to eradicate Barrett’s esophagus

Research – Sub-Investigator

  1. A Phase II, Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study of (XXXXXX) in Women with Constipation-Predominant, Irritable Bowel Syndrome (C-IBS)
  2. A Phase II Multicenter, Open Label Extension Study to Evaluate the Long-term Safety of (XXXXXX), 4mg Once daily in Women with Constipation–Predominant Irritable Bowel Syndrome(C-IBS)
  3. A 12 Week, Randomized, Double Blind, Dose Ranging Placebo-Controlled Study of (XXXXXX)) in Subject with Irritable Bowel Syndrome (T106A)


Lyday, WD. Key Note Speaker. Reversal of Chronic Disease through Multidisciplinary Weight Management Program. National Weight Management Summit. Las Vegas, Nevada; March 2009


American College of Gastroenterology

American Society of Gastrointestinal Endoscopy

John B Graham Research Society, University of North Carolina


Lyday W, Finkelstein S. Molecular Pathogenesis of Early Development and Progression of Barrett’s Esophagus. Digestive Disease Week, San Diego, CA; Abstract 2008.

Lyday W, Finkelstein S. The Molecular Pathology of Radiofrequency Mucosal Ablation in Barrett’s Esophagus. Digestive Disease Week, San Diego CA; Abstract 2008.

Lyday W. Reversal of Decompensated Liver Disease Through Weight Management Program Utilizing Calorie Restriction, Behavior Modification, and Physician Monitoring. Obesity Society Meeting, Washington DC; Abstract 2009

Shaheen NJ, Kim HP, Bulsiewicz WJ, Lyday WD, Triadafilopoulos G, Wolfsen HC, Komanduri S, Chmielewski GW, Ertan A, Corbett FS, Camara DS, Rothstein RI, Overholt BF. Prior fundoplication does not improve safety or efficacy outcomes of radiofrequency ablation: results from the U.S. RFA Registry. J Gastrointest Surg. 2013 Jan;17(1):21-8; discussion p.28-9. doi: 10.1007/s11605-012-2001-8. Epub 2012 Sep 11.

Lyday WD, Corbett FS, Kuperman DA, Kalvaria I, Mavrelis PG, Shughoury AB, Pruitt RE Radiofrequency ablation of Barrett’s esophagus: outcomes of 429 patients from a multicenter community practice registry. Endoscopy. 2010 Apr;42(4):272-8. doi: 10.1055/s-0029-1243883. Epub 2010 Feb 9.

William J. Bulsiewicz, Evan S. Dellon, William D. Lyday, Atilla Ertan, Daniel S. Camara, Srinadh Komanduri, Gary W. Chmielewski, V. Raman Muthusamy, Nicholas J. Shaheen. Predictors of recurrent Barrett’s esophagus after successful radiofrequency ablation in a nationwide, multicenter cohort: Results from the U.S. RFA Registry. Gastroenterology Volume 144, Issue 5, Supplement 1, May 2013, Pages S-1

Lyday WD, DiBaise JK. Metoclopramide-stimulated gastric emptying scintigraphy: does it predict symptom response to prokinetic therapy in chronic gastroparesis? Am J Gastroenterol. 2002 Sep;97(9):2474-6.