(For a more detailed profile on one of the physicians listed below, please click on the name of the physician)

Joseph E. Geenen, M.D.
Partner & Founder

Clinical Professor of Medicine at the Medical College of Wisconsin. He was named one of the "400 Best Doctors in America" by Good Housekeeping Magazine, as well as being named one of the best in the Milwaukee area by Milwaukee Magazine. He is known nationally and internationally for his published articles and speaking engagements.

 

Marc F. Catalano, M.D.
Partner

Former Associate Director of Endoscopy at Temple University in Philadelphia. Previous training at the Cleveland Clinic. He has written many articles pertaining to endoscopy and specializes in endoscopic ultrasound.

 

Daniel J. Geenen, M.D.
Partner

Dr. Daniel Geenen completed his Gastroenterology Fellowship at the University of North Carolina Hospitals in Chapel Hill, North Carolina. He treats all adult gastrointestinal disorders with special interest in patients with esophageal, pancreatic and liver disease.

 

Ricardo A. Li, M.D.

Partner
Dr. Li was born in Lima, Peru. He completed his gastroenterology training at the University of Minnesota. He has received various honors throughout his academic training. He is fluent in English, Chinese, and Spanish.

 

Rajeev Nayar, M.D.

Partner
Dr. Nayar was born in in New Dehli, India. He completed his training in Internal Medicine and Gastroenterology at Georgetown University in Washington, D.C. He is board certified in Internal Medicine and Gastroenterology.

 

Michael J. Schmalz, M.D.

Partner
Associate Clinical Professor of Medicine at the Medical College of Wisconsin. He has written many articles pertaining to hepatobiliary and pancreatic diseases.

 

Tedd P. Cain, M.D.
Dr. Cain has practiced Gastroenterology in the Midwest throughout his career. His special interests include Inflammatory Bowel Disease, especially Crohn's Disease; Irritable Bowel Syndrome; as well as Billiary Disease. He is a member of multiple Gastroenterology Societies. He has served as Medical Director of Endoscopy at Rockford Memorial Hospital, and Chairman of the Gastroenterology Departments of Rockford Health System and Allsaints Medical Group in Racine. He is Board Certified in Internal Medicine and in Gastroenterology.

Lyndon V. Hernandez, M.D.
Dr. Hernandez earned his medical degree from the University of Santo Tomas, Philippines, in 1990, and completed his residency and fellowship training at the University of Wisconsin, Milwaukee Clinical Campus.  He then pursued a one-year subspecialty fellowship in advanced endoscopy at the University of Florida, Gainesville.

Farhat N. Khan, M.D. (Pediatrics)
Dr. Khan completed her Pediatric Gastroenterology Fellowship at Children's Hospital Medical Center in Cincinnati, Ohio. She is a Pediatric and Adolescent Gastroenterologist who treats all pediatric and adolescent gastrointestinal and nutritional disorders. She has special interest in inflammatory bowel disease, gastroesophageal reflux, liver and pancreatic disease.

Maria "Tes" Rivera-Bennett, M.D. (Pediatrics)
Dr. Rivera-Bennett is a pediatric gastroenterologist and specializes in treating children ages birth to 18 years. She received her Doctor of Medicine from the University of Santo Tomas University Hospital, Manila. Dr. Rivera-Bennett did her Pediatric Residency at Children's Hospital of Wisconsin. She completed her Pediatric Gastroenterology Fellowship at Children's Hospital of Wisconsin and the Medical College of Wisconsin.

A. Nur Aktay, M.D. (Pediatrics)
Dr. Aktay is a pediatric gastroenterologist with an exceptional interest in treating children and adolescents with motility disorders (reflux, constipation), inflammatory bowel disease, and peptic ulcer disease. She received her Doctor of Medicine from the University of Istanbul, Turkey, and completed her residency at The University of Chicago Children's Hospital. She completed her Pediatric Gastroenterology fellowship at Children's Hospital of Wisconsin. Dr. Aktay is board certified by the American Board of Pediatrics and American Board of Pediatric Gastroenterology. She has submitted several abstracts to national and international meetings.

Nalini M. Guda, M.D.
Dr. Guda completed both his Internal Medicine residency and Gastroenterology fellowship at the University of Wisconsin Milwaukee Clinical Campus. He received advanced ERCP and endoscopic ultrasound training at Hennepin County Medical Center in Minneapolis, Minnesota. His special interests include biliary and pancreatic disease management. Dr. Guda is Board Certified in Internal Medicine and Gastroenterology.

Aman K. Singh, M.D.
Dr. Singh received her medical degree from University of Missouri Kansas City. She completed her fellowship in Gastroenterology at University of Texas. Dr. Singh treats all adult GI disorders with a special interest in Hepatitis C, steatohepatitis and cirrhosis. Dr. Singh is Board Certified in Internal Medicine and Board Eligible in Gastroenterology.

Cristino C. Canga III, M.D.
Dr. Cristino Canga, III is from Cebu, Philippines. He earned his undergraduate degree from the University of San Carlos, graduating Magna Cum Laude in 1989. He received his medical degree from Cebu Doctors’ College of Medicine and continued his internship through Cebu Doctors’ Hospital. He has completed his residency in Internal Medicine at Cook County Hospital in Chicago, IL. His fellowship in gastroenterology was completed in 2002 at Aurora Sinai Medical Center in Milwaukee, WI.