Dr. S. Mark Bettag

Dr. S. Mark Bettag’s is board certified in Hematology/Medical Oncology, Internal Medicine, Hospice and Palliative Care Medicine. He began practicing in Sheboygan County in 1995.  In 2004, Dr. Bettag opened Sheboygan Cancer & Blood Specialists. Patients appreciate his dedication, expertise, and deep concern for their special needs.

Dr. Bettag completed an Internal Medicine residency a Loyola University Medical Center in Maywood, Illinois, and a Hematology/Oncology fellowship at the University of Colorado Health Sciences Center in Denver.

Related Professional Affiliations

American Association of Cancer Research (Member)
American College of Physicians (Member)


St. John’s University, Minnesota
Rush Medical College, Illinois

Graduate Residency
Loyola University Medical Center, Illinois

Medical Oncology Fellowship
University of Colorado Health Sciences Center, Colorado