Faculty

Division of Gastroenterology

Faculty of the Division of Gastroenterology at Georgetown University offer the most advanced diagnostic and treatment techniques available.

To learn more about our faculty, follow the links below to access their MedStar Georgetown University Hospital faculty profiles. If a particular faculty member doesn't have a link, their profile is currently under development and will be available shortly.


Nadim G. Haddad, M.D. 
Associate Professor of Medicine
Chief, Division of Gastroenterology

Second Floor, Main Hospital, M2025
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-6274

Medical Degree: Texas Technical University Health Science Center, 1988
Internship: Georgetown University & Veterans Administration Medical Center, 1991
Residency: Georgetown University Medical Center, 1991
Fellowship: Georgetown University Medical Center, 1993
Certification: Internal Medicine, 1992; Gastroenterology, 1995, 2008 (recertified)
Special Interests: Endoscopic ultrasonography, hepatobiliary, pancreatic gastrointestinal cancer and gastrointestinal bleeding


Alioska Motamedi, MHA
Regional Administrator, Division of Gastroenterology

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-1223


Thomas Loughney, M.D.
Associate Professor of Medicine and Director of Endoscopy Unit

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-1670

Medical Degree: Georgetown University School of Medicine, 1989
Internship: Walter Reed National Military Medical Center, 1990
Residency: Walter Reed National Military Medical Center, 1992
Fellowship: Walter Reed National Military Medical Center, 1996
Certification: Internal Medicine, 1992; Gastroenterology, 1997
Special Interests: Endoscopy, biliary endoscopy, biliary disease, colon cancer detection and screening, pancreatic disease


Stanley B. Benjamin, M.D., FACP, FACG
Professor of Medicine
Division of Gastroenterology

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-1669
Fax: (202) 444-4098

Specialties: Gastroenterology
Medical Degree: University of Pittsburgh, 1974
Internship: National Naval Medical Center, 1975
Residency: National Naval Medical Center, 1977
Fellowship: National Naval Medical Center, 1979
Certification: Internal Medicine, 1977; Gastroenterology, 1979
Special Interests: Esophageal disease, biliary endoscopy, esophageal and biliary manometry


 

John Carroll, M.D.
Assistant Professor of Medicine

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-6649
Fax: (202) 444-7074

Specialties: Gastroenterology
Medical Degree: Medical College of Wisconsin, 1993
Internship: Georgetown University, 1994
Residency: Georgetown University, 1996
Fellowship: Gastroenterology, Georgetown University Medical Center, 1999
Certification: Gastroenterology, 2001
Special Interests: Endoscopic ultrasound for digestive cancers, Barrotts


Walid Chalhoub, M.D.
Assistant Professor of Medicine

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-6274
Fax: (202) 444-7074

Medical Degree: Balamand Medical School, 2005
Internship: Mount Sinai Medical Center, 2009
Residency: Mount Sinai Medical Center, 2011
Fellowship: MedStar Georgetown University Hospital,  2015
Special Interests: Advanced Endoscopy, Pancreaticobiliary diseases, EUS-ERCP


Aline Charabaty-Pishvaian, M.D.
Associate Professor of Medicine
Director, Center for Inflammatory Bowel Diseases

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-3646
Fax: (202) 444-7074

Medical Degree: St Joseph University, Lebanon, 1998
Internship: St Raphael’s Hospital- Yale University, CT, 2000
Residency: Georgetown University Hospital, Washington DC, 2002
Fellowship: Georgetown University Hospital, Washington DC, 2005
Certification: Internal Medicine, 2002; Gastroenterology, 2006
Special Interests: Inflammatory bowel diseases, gastrointestinal cancers, endoscopic ultrasound, women's health, celiac diseae


James H. Lewis, M.D., FACP, FACG
Professor of Medicine and Director of Hepatology

Second Floor, Main Hospital, M2408
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-1671

Specialties: Gastroenterology
Medical Degree: State University of New York. 1975
Internship: Baylor College of Medicine, 1976
Residency: State University of New York, Downstate Medical Center, 1978
Fellowship: George Washington University Hospital, 1960
Certification: Internal Medicine, 1978; Gastroenterology, 1981
Special Interests: Hepatology (viral hepatitis, hepatitis C, drug-induced liver disease), liver transplantation evaluation, liver and colon cancer screening

 


 

Bruce  A. Luxon, M.D., PhD
Chairman and Chief of Service
Anton and Margaret Fuisz Professor of Medicine

Specialties: Hepatology
Medical Degree: University of Missouri at Columbia, 1985
PhD: Mathematics, University of Missouri at Columbia,1983
Internship: University of Missouri, Columbia, 1987
Residency: University of Missouri, Columbia, 1989
Fellowship: University of California, San Francisco, 1992
Certification: Internal Medicine, 1989;  Gastroenterology, 1992, 2002, 2012; Transplant Hepatology, 2006 
Special Interests: Special focus in autoimmune hepatitis and cholestatic liver diseases as well as hepatitis C; hepatic stellate cells and the role they play in causing liver fibrosis and cirrhosis.


Mark Mattar, M.D.
Associate Professor of Medicine, Program Director GI Fellowship Training Program
Inflammatory Bowel Disease Center

Second Floor, Main Hospital, M2408
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-1671

Medical Degree: Virginia Commmonwealth University School of Medicine, 2004
Internship: Olive View - UCLA Medical Center, 2005
Residency: Olive View- UCLA Medical Center, 2007
Fellowship: Georgetown University Hospital, 2010
Certification: Internal Medicine, 2007; Gastroenterology, 2010
Special Interests: Inflammatory bowel disease, Crohn's disease, Ulcerative colitis, Microscopic colitis, Celiac disease


Caren S. Palese, M.D.
Assistant Professor of Medicine

Second Floor, Main Hospital
MedStar Georgetown University Hospital
Washington, DC 20007
(202) 444-3646

 

Medical Degree: Mount Sinai School of Medicine, 2000
Internship: Georgetown University Hospital, 2001
Residency: Georgetown University Hospital, 2003
Fellowship: Georgetown University Hospital, 2007
Certification: Internal Medicine, 2004; Gastroenterology, 2007
Special Interests: Therapeutic endoscopy, esophageal manometry, gastrointestinal cancers, colon cancer screening


Shervin Shafa, M.D.
Assistant Professor of Medicine

Second Floor, Main Hospital
Georgetown University Hospital
Washington, DC 20007
(202) 444-1039

Medical Degree: Brody School of Medicine at East Carolina University, 2007
Internship: George Washington University Hospital, 2009
Residency: George Washington University Hospital, 2011
Fellowship: Georgetown University Hospital, 2014
Certification: Internal Medicine, 2011; Gastroenterology, 2014
Special Interests: Esophageal diseases, motility disorders


Jill Smith, M.D.
Professor of Medicine

Second Floor, Main Hospital
Georgetown University Hospital
Washington, DC 20007
(202) 444-8541

Medical Degree:  University of Florida College of Medicine, 1980
Internship: University of Missouri Medical Center, 1981
Residency: University of Missouri Medical Center, 1983
Fellowship: University of Missouri-Columbia, 1987
Certification: Internal Medicine, 1984; Gastroenterology, 1987
Special Interests: Hepatology, Inflammatory bowel disease