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Carol M. vanHaelst, MD


Medical Oncology

Conditions Treated

breast cancer, gastrointestinal cancer, and gynecologic cancer

Procedures Performed

medical oncology treatment of breast cancer, medical oncology treatment of gastrointestinal cancer, and medical oncology treatment of gynecologic cancer

Contact Information

  • Office: 425-441-2600
  • Fax: 425-441-2700






Dutch, English, French, and German

Board Certification

Board Certified in Medical Oncology
Board Certified in Hematology
Board Certified in Internal Medicine


Dr. Carol van Haelst is a fellowship trained hematologist and medical oncologist with more than 20 years of clinical experience. She is also a Clinical Assistant Professor of Medicine at the University of Washington.
Dr. van Haelst treats patients exclusively at the Halvorson Cancer Center.

Clinical Expertise

Special interest in treating women with breast cancer. Dr. van Haelst also cares for patients with benign and malignant blood disorders, gynecologic and gastrointestinal cancers.

Philosophy of Care

A diagnosis of cancer presents you with complex decisions. I feel very privileged to be able to help guide and inform you, as we decide together, on the best approach using the most current knowledge and experience available.
Although my goal for you is to provide the greatest chance for cure or long lasting remission, I also value the importance of minimizing the long-term impact of therapy on your well-being.

Medical School

University of Louvain | Brussels, Belgium


Waterbury Hospital | Waterbury, CT


Boston City Hospital (hematology) | Boston, MA


Waterbury Hospital | Waterbury, CT

Personal Information

My husband and I moved to the Pacific Northwest in 1992 from Minnesota, where we were both on staff at the Mayo Clinic.