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Faculty and Staff

There are 14 gastroenterologists on staff who supervise subspecialty fellows in caring for patients in the areas of inpatient, outpatient and procedural services. The GI and IRL teams also include NPs, advanced practice nurses, PAs, RNs and inpatient and outpatient dieticians, as well as two clinical psychologists.

Ian Leibowitz, M.D. | Division Chief
Dr. Leibowitz has a special interest in IBD and quality improvement. He came to Children’s National with years of experience as chief of pediatric gastroenterology at INOVA Fairfax Hospital and as medical director of our affiliate subspecialty clinic, Pediatric Specialists of Virginia.

Vahe Badalyan, M.D., M.B.A. 
Dr. Badaylan graduated from Children's National GI fellowship program, during which time he completed research training at the National Institutes of Health. He was previously chief resident of pediatrics at INOVA Fairfax Hospital and has taken the lead on several technology-related initiatives to improve the delivery of patient care.

Ali Bader, M.D.
Dr. Bader's primary area of expertise is his clinical skill and experience as a general GI practitioner and expert proceduralist. Dr. Bader also helps precept trainees in fellow’s continuity clinic.

Shayna Coburn, Ph.D.
Dr. Coburn is a licensed psychologist and assistant professor of Psychiatry and Behavioral Sciences at the George Washington University School of Medicine and Health Sciences. She has been an integral part of the division’s Comprehensive Celiac Disease Program and has a special interest in patient-physician communication.
Anil Darbari, M.D., M.B.D., M.H.S. | Assistant Division Chief and Director of the Comprehensive Motility Program
Dr. Darbari joined our faculty in 2010 and has developed our Comprehensive Motility Program. He is one of a few pediatric experts experienced in the full spectrum of motility procedures.
Benny Kerzner, M.D. | Professor Emeritus
Dr. Kerzner is recognized nationally and internationally as an outstanding clinician with expertise in inflammatory bowel disease (IBD) and feeding disorders. He is the faculty lead in Children's National's multidisciplinary Celiac Disease Program.
Muhammad Khan, M.D., M.P.H. | Director, Endoscopy Unit
Dr. Khan completed his fellowship at Stanford and joined our faculty in 2011. He has a special interest in pancreaticobiliary disorders, endoscopic evaluation and therapy, including endoscopic retrograde cholangiopancreatography (ERCP).

Seema Khan, M.D.
Dr. Seema Khan completed her fellowship at Pittsburgh and joined our faculty in 2011, after spending several years at A.I. DuPont Hospital. She has a research background in intestinal allergy and heads our multidisciplinary Eosinophilic Esophagitis Clinic along with the director of the Children’s National Food Allergy Program. 

Parvathi Mohan, M.D. | Director of the Hepatology Program
Dr. Mohan heads our Hepatology program and continues to be involved in several national hepatology research consortiums and is a well-respected regional expert in liver disease, especially in the areas of infectious hepatitis, acute liver failure, short bowel syndrome and intestinal and liver transplantation. She has developed an active clinical research program with a special focus on infectious hepatitis.

Shikib Mostamand, M.D.
Dr. Mostamand was recruited to join our Comprehensive Motility Clinic and has also taken on an active role in precepting fellows clinic.

Diana Moya, M.D.
Dr. Moya is an integral member of several of our fellows’ scholarly oversight committees, and an active clinician on the wards and ambulatory clinics.

Lisa Opipari-Arrigan, Ph.D.
Dr. Opipari-Arrigan is a licensed clinical and pediatric psychologist with a special interest in health care communication.

Teena Sebastian, M.D.
Dr. Sebastian attends on the inpatient Intestinal Rehabilitation/Liver service, and evaluates general GI patients in the clinic, with a focus on IBD.

Sona Sehgal, M.D. | Inpatient Medical Unit Director
Dr. Sehgal is the medical unit director of the Gastroenterology & Intestinal Rehabilitation units and is the GI lead in our multi-disciplinary Aerodigestive Clinic. She also has a special interest in pancreatitis.

Clara Torres, M.D. | Director, Intestinal Rehabilitation/Transplant/Liver Program
Dr. Torres has developed a national and international reputation as an expert in intestinal rehabilitation and transplantation. She has developed an active clinical research program with a special focus on short bowel syndrome.

Jaime Liou Wolfe, M.D. | Fellowship Program Director
Dr. Wolfe has served as fellowship program director since 2012. She completed a chief residency in pediatrics and has continued her interest in education overseeing the division's resident and medical student rotations.