Ruth C. Warren, D.O.


Dr. Warren has been with Green Bay Oncology since 2008. She attended medical school at Midwestern University: Chicago college of Osteopathic Medicine and completed her residency in Internal Medicine at Scott & White Hospital, part of Texas A&M Health Science Center College of Medicine. She completed her Medical Oncology fellowship at the University of Wisconsin Hospital and Clinics in Madison, Wisconsin. She holds Board Certifications in Internal Medicine and Medical Oncology. She is passionate about research and the continued promise of new treatments for cancer patients.

She and her husband have three young children.

“It’s my goal to develop a meaningful and gratifying connection with my patients, helping them to deal with their cancer diagnosis, treatment and recovery.”


  • Treatment of all cancer types
  • Community Clinical Oncology Program (CCOP) trial participant


  • Midwestern University Chicago College of Osteopathic Medicine, Downers Grove, IL


  • Scott & White Hospital, Texas A&M Health Science Center College of Medicine, Temple, TX


  • Medical Oncology: University of Wisconsin Hospital and Clinics, Madison, WI
  • Internal Medicine: Scott & White Hospital, Texas A&M Health Science Center College of Medicine, Temple, TX


  • Medical Oncology
  • Internal Medicine


  • Extensive research background and experience
  • Past physician volunteer for DOCARE, serving in Guatemala and Central America
  • Married, mother of three children


Dr. Warren is a thoughtful and clear communicator who delivers compassionate care tailored to each of her patients.
KEY TRAITS: Perceptive, articulate, determined

  • Ruth's Blog Posts

    Clinical trials are essential to the improvement and advancement of medical care. Research studies explore whether a medical strategy, treatment or device is safe and effective. Ultimately, it is objective ...

    Understanding the advancements in cancer means having an understanding of how cancer starts and how it is treated. Basically cancer is a broken cell. At one point the cancer cell ...