Norman R. Richards, MD

Dr. O’Mahar is a board-certified oncologist. She obtained her undergraduate degree from Stanford University and earned her medical degree from the Washington University School of Medicine in St. Louis. She completed her internship at Barnes-Jewish Hospital in St. Louis and her fellowship at the University of Wisconsin - Madison. Her area of expertise is the treatment of multiple myeloma, myelodysplastic syndromes, monoclonal gammopathy, melanoma and acute and chronic leukemia. In her free time, Dr. O’Mahar enjoys baking and writing sort stories and poetry.

Nguyet-Anh Tran, MD is board certified in rheumatology and in internal medicine.

Geoffrey Dang-Vu is board certified in internal medicine and practicing in gastroenterology. He obtained his undergraduate degree from Washington University in St. Louis, MO and earned his medical degree from Rush Medical College in Chicago, IL. He went on to complete his residency in internal medicine and his fellowship in gastroenterology and hepatology at the Medical College of Wisconsin in Milwaukee, WI. Dr. Dang-Vu's medical interests include Crohn's disease, ulcerative colitis, esophageal motility disorders, gastroesophageal reflux disease, and disorders of defecation.