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Our Physicians

A distinquished, accomplished staff, respected for its training, teaching, and patient care

Aria carefully selects physicians for its gastroenterology service, to assure that every one of our practitioners has the highest level of skill and offers the very best in care.  Our experienced gastroenterologists all have first-rate training and excellent experience.  They have exceptional records in patient care, and they approach every case individually and with leading-edge level of knowledge.

Each physician has areas of special interest and expertise while still offering general care for conditions of the digestive system for inpatients and outpatients.  All of our doctors are board-certified in the subspecialty of gastroenterology.  They have been involved in research, serve on editorial boards and a variety of committees, have published in their field, and have taught and been invited speakers at a number of medical centers.

Harvey B. Lefton, MD, is a graduate of the University of Pittsburgh and of the Jefferson Medical College of Thomas Jefferson University.  He completed his internship, his residency in internal medicine, and a fellowship in gastroenterology at The Cleveland Clinic Hospital.  He served as Chief of Gastroenterology at Scott Air Force Base in Illinois.  Dr. Lefton has been a faculty member at Drexel University College of Medicine (formerly MCP/Hahneman School of Medicine) since 1976.  He currently teaches at the medical school as a Clinical Professor of Medicine.  He is Chief of Gastroenterology at Aria Health  and consults at a number of other hospitals.  He is a Fellow of the American College of Physicians, the American Gastroenterologic Association, the American College of Gastroenterology, and the Philadelphia College of Physicians.  He also serves as President of the Pennsylvania Society of Gastroenterology and is the former President of the Medical Staff at Aria Health.  His special interests include inflammatory bowel disease.  Dr. Lefton had the central role in starting a two-day, CME update conference that the practice holds annually for area physicians.

Mark L. Bierhoff, MD, is a graduate of Muhlenberg College and the University of Medicine and Dentistry of New Jersey.  Dr. Bierhoff’s training includes an internship and residency at the Drexel University College of Medicine (formerly MCP Hahnemann University School of Medicine); he also completed a fellowship in gastroenterology and hepatology at Temple University Hospital.  Dr. Bierhoff is a member of the member of the American Gastroenterological Association and has served within Aria's Division of Gastroenterology since 1985.  His expertise includes all areas of Gastroenterology and Hepatology including the treatment of acid reflux, gallstones, hepatitis, hernias and inflammatory bowel disease.

Geoffrey L. Braden, MD, GI Specialist, Geoffrey L. Braden, MD, is a graduate of the University of Cincinnati and Ohio State University Medical School. He was inducted into the Alpha Omega Alpha medical honorary society as a junior.  He served his internship and residency in internal medicine at the University of Chicago Hospitals and Clinics.  He completed a clinical fellowship, followed by a research fellowship, both in gastroenterology, at Brigham and Women’s Hospital, Harvard Medical School.

He has been a long-time faculty member at Drexel University College of Medicine (formerly MCP/Hahneman School of Medicine), where he is currently a Clinical Associate Professor of Medicine.  Dr. Braden has been Chief of Internal Medicine at Aria Health since 1993. He currently is Chairman of the Credentials Committee and serves on the Medical Executive Committee at Aria. Dr. Braden has also served as President of the Medical Staff at Aria. He is a Fellow of the American College of Physicians, the American College of Gastroenterology, and the American Gastroenterological Association. Dr. Braden is a nationally recognized leader in Medical Informatics. He is currently the Web Editor for the American Gastroenterological Association and redesigned that societies’ web site and also created a mobile tool for gastroenterologists. He was just appointed the Chair of the AGA Think Tank on the Future of Practice.

He is the founding editor of the GI section of Medscape , a post he has had held since 2001 (www.medscape.com). His special interests include the treatment of inflammatory bowel disease and chronic liver disease.

Raynard J. Cheung, MD, is a graduate of Harvard University and of the University of Pennsylvania School of Medicine.  He did his internship and residency in internal medicine at the Hospital of the University of Pennsylvania.  He completed his fellowship in gastroenterology at Thomas Jefferson University Hospital.  Dr. Cheung’s areas of interest include inflammatory bowel disease, hepatology, and clinical research.

 

 

Matthew S. Cohen, MD, is a graduate of Duke University and of Jefferson Medical College.  He did his internship and residency at Montefiore Medical Center, Albert Einstein College of Medicine.  Dr. Cohen recently completed his fellowship in gastroenterology and hepatology at Thomas Jefferson University Hospital.  He offers inpatient consultations and outpatient office hours at both the Torresdale and Bucks County locations.




Lawrence B. Grossman, MD,
is a graduate of Lafayette College and the Temple University School of Medicine.  Dr. Grossman’s training includes an internship and residency at the University of Pittsburgh Medical Center; he also completed a fellowship in gastroenterology and hepatology at Temple University Hospital.  Dr. Grossman is board certified in internal medicine and his expertise includes all areas of Gastroenterology and Hepatology including Endoscopic Retrograde Cholangiopancreatography, colonoscopy, colorectal screening and the treatment of acid reflux, ulcers and inflammatory bowel disease.

Alexander J. Harmatz, MD, is a graduate of Emory University and the Medical College of Georgia.  He also has a master's degree in chemistry from Emory University.  Dr. Harmatz did his internship and residency in internal medicine at Sinai Hospital in Baltimore, Md.  He completed his fellowship in gastroenterology at Stanford School of Medicine.  For the past 10 years, Dr. Harmatz has helped to set the standards for biliary endoscopy at Aria Health.  He is an Assistant Professor of Medicine at Drexel University College of Medicine.  His special interests include biliary endoscopy and ERCP.

 

Jamie A. Kasper, MD, is a graduate of the University of Scranton and of the Medical College of Pennsylvania (later MCP/Hahneman Medical School and now Drexel University Medical College).  She completed her residency and internship in internal medicine, and her fellowship in gastroenterology, at Thomas Jefferson University Hospital.  Her special interests include gastroenterologic conditions common to women, such as inflammatory bowel disease, gallstones, and pelvic floor conditions.  She has a special role in managing some of the practice's most challenging cases of irritable bowel syndrome.

 

Jenifer K. Lehrer, MD, is a graduate of the University of Pennsylvania and the University of Pennsylvania Medical School.  She did her internship and residency at the Hospital of University of Pennsylvania and completed her fellowship in gastroenterology at Graduate Hospital with a third year of concentration in esophageal disorders at Albert Einstein Medical Center.  Her areas of interest and special expertise are motility disorders, as well as GI disorders in women, including irritable bowel syndrome and pelvic floor dysfunction.

 

Michael Lieb, MD, is a graduate of Brooklyn College and the Universidad Central Del Este School of Medicine in the Dominican Republic.  Dr. Lieb’s training includes an internship at Instucion Universitaria Centro in the Dominican Republic and residency at Episcopal Hospital in Philadelphia; he also completed a fellowship in gastroenterology and hepatology at the Medical College of Pennsylvania.  Dr. Lieb is board certified in Gastroenterology and has served within Aria's Division of Gastroenterology for over 20 years.  His expertise includes all areas of Gastroenterology and Hepatology including the treatment of inflammatory bowel disease, jaundice, peritonitis, ulcers and is skilled in performing colonoscopies.

Eugene M. Mayer, MD, is a graduate of Rutgers University and the Temple University School of Medicine.  Dr. Mayer’s training includes an internship and residency at Temple University School of Medicine; he also completed a fellowship in gastroenterology at the Temple University School of Medicine.  He is a member of the American Gastroenterological Association and has served within Aria's Division of Gastroenterology since 1977.  His expertise includes all areas of Gastroenterology and Hepatology including the treatment of acid reflux, celiac disease, constipation, cirrhosis, dysphagia and gallstones.

Jeffrey M. Pilchman, MD, is a Phi Beta Kappa graduate of the University of Maryland and of the University of Medicine and Dentistry of New Jersey Medical School.  He also has a master's degree in physiology from Georgetown University.  He did his internship and residency in internal medicine, and completed a fellowship in gastroenterology, at the Medical College of Pennsylvania (later MCP/Hahneman Medical School and now Drexel University College of Medicine.)  He has appointments as an attending physician at a number of area hospitals, as well as teaching responsibilities at Aria Health ths and Graduate Hospital.  He also directs the teaching pathways and clinical rotations for medical students and family practice residents who rotate through the Gastroenterology service at Aria Health. Dr. Pilchman is a long-time faculty member and currently clinical associate professor at the Drexel University College of Medicine. Dr. Pilchman is President of the Practs Ambulatory Services Center.  His special interests include capsule endoscopy, therapeutic endoscopy, colon cancer, and screening for both colon cancer and Barrett's esophagus.

Gregory D. Schapiro, MD, is a graduate of Duke University and of Jefferson Medical College.  He did his internship and residency at Thomas Jefferson University Hospital. He was a Harvard Clinical Fellow in Medicine at New England Deaconess Hospital and he completed a fellowship in gastroenterology at Thomas Jefferson University Hospital.  He is a Clinical Assistant Professor of Medicine at Drexel University College of Medicine and a Clinical Associate Professor of Medicine at Philadelphia College of Osteopathic Medicine.  His special interests include biliary and capsule endoscopy, as well as ERCP.  Dr. Schapiro also serves the important role of overseeing the teaching aspects of the gastroenterology and hepatology fellowship program at Aria Health. His special interests include biliary endoscopy/ERCP.

 

Maya Spodik, MD, is a graduate of Temple University and the Drexel University College of Medicine (formerly MCP Hahnemann University School of Medicine.)  Dr. Spodik’s training includes an internship and residency at Thomas Jefferson University Hospital; she also completed a fellowship in gastroenterology and hepatology at Thomas Jefferson University Hospital.  Dr. Spodik is a member of the member of the American Gastroenterological Association, the American College of Gastroenterology and the American Society for Gastrointestinal Endoscopy and has served within Aria's Division of Gastroenterology since 2010.  Her expertise includes all areas of Gastroenterology and Hepatology including the treatment of gastroparesis, hemorrhoids, hepatitis, hernias and indigestion.

Anthony L. Rosa, MD, is a graduate of Princeton University and of the University of Medicine and Dentistry of New Jersey.  He did his internship and residency at UMDNJ Robert Wood Johnson Medical Center, where he was Intern of the Year and Chief Resident.  He recently completed his fellowship in gastroenterology and liver diseases at Cooper Hospital/University Medical School.  Dr. Rosa has a special interest in biliary endoscopy. His role includes both inpatient consults and outpatient office hours primarily at the Torresdale campus.

 

Paul B. Weisberg, MD, is a graduate of Temple University and Temple University Medical School.  He also has a master's degree in psychology from Temple University.  He did his internship and residency in internal medicine at Thomas Jefferson University Hospital and he completed his fellowship in gastroenterology at the Hospital of University of Pennsylvania.  Dr. Weisberg previously held a number of faculty and hospital appointments, including Vice Chairman of the Department of Medicine at Roxborough Memorial Hospital.  Dr. Weisberg is a Clinical Assistant Professor of Medicine at Drexel University College of Medicine.