Mark Klaas, MD


Critical care medicine and Pulmonary disease


  • Mark Klaas, MD

    at ProHealth Oconomowoc Memorial Hospital 791 Summit Ave. Oconomowoc, WI 53066

    Main: 262-569-0454
  • Mark Klass, MD

    at ProHealth Waukesha Memorial Hospital 725 American Ave., Suite 1336 Waukesha, WI 53188

    Main: 262-928-2391





Creighton University School of Medicine, Omaha, NE


Creighton University School of Medicine, Omaha, NE


Medical College of Wisconsin Affiliated Hospitals, Milwaukee, WI Tenet-St Joseph Hospital, Omaha, NE

Board Certifications

  • Critical Care Medicine
  • Internal Medicine
  • Pulmonary Disease

Philosophy of Care

“I believe in providing patient-centered care that takes into consideration a patient’s personal preferences, values, and lifestyle. In providing care, I collaborate with patients and their families to provide the education, support and tools they need to make decisions and administer self-care to improve their health.”

Hobbies and Personal Interests

Dr. Klaas is married and has two children. He enjoys running, playing the organ, and working with computers.

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