I am the Chief of Staff at the VA North Texas Health Care System (VANTHCS). As the Chief of Staff, I oversee more than 300 staff physicians and several hundred medical residents and fellows. I am responsible for major program development and administrative oversight of VANTHCS patient care, teaching and research activities. I graduated magna cum laude from Rice University and received my medical degree from UT Southwestern Medical School. I did my residency in Medicine and my research and clinical fellowship in Infectious Diseases at Vanderbilt University School of Medicine. I am a Fellow of the American College of Physicians (ACP), serve on the ACP Health and Public Policy Committee for Texas and am the Governor-Elect for The Northern Texas District of ACP. I am also a Fellow of the Infectious Diseases Society of America, a past president of the Texas Infectious Diseases Society and am a member of the Texas Club of Internists.


Medical School
UT Southwestern Medical Center (1972)

Research Interest

  • Drug Interactions
  • Formulary Management
  • Gastrointestinal Infections
  • Molecular Epidemiology
  • Mycotic Infections


Featured Publications LegendFeatured Publications

Parkland Pocket Guide to HIV Care, Edition 3
Keiser P, Nassar N, and Gregg CR In Press 2004
Cytochrome P450
Gregg C R Encyclopedia of Gastroenterology 2002 in press 450
Enteric Bacterial Flora and Bacterial Overgrowth Syndrome
Gregg CR Semin. Gastrointest. Dis. 2002 13 200-209
Enteric Bacterial Flora and Bacterial Overgrowth Syndrome
Gregg CR, Toskes PP Feldman M, Friedman LS, Sleisenger MH, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Diseases 2002 Edition 7 1783-1793

Professional Associations/Affiliations

  • Fellow, American College of Physicians
  • Fellow, Infectious Diseases Society of America
  • Texas Club of Internists