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Kevin K. Oyama, MD


Board Certifications

Anatomic and Clinical Pathology


Cascade Pathology Services


Cascade Pathology Services, a Sonic Healthcare anatomic pathology practice, is privileged to include Kevin K. Oyama, M.D., as a member of our professional medical staff. Dr. Oyama has extensive hospital and laboratory experience with a career spanning over 28 years with Legacy Health.

Dr. Oyama graduated with a Bachelor of Science degree from the University of Oregon in Eugene in 1985. He received his medical degree from the Oregon Health & Science University in Portland, where he subsequently completed both a general surgery internship and an anatomic and clinical pathology residency in 1994.

Since joining Cascade Pathology in 1994, Dr. Oyama has served in various key positions for hospitals and professional committees. These include laboratory director and member of the Surgery Department Executive Committee for Legacy Meridian Park Hospital in Tualatin, Oregon, and medical director for The Olson Memorial Clinic, along with five other pediatric clinics in the metro area, between 1994-2021. Currently, he serves as the CLIA laboratory director of Legacy Silverton Medical Center.

Dr. Oyama currently holds full medical licensure and is board certified by the American Board of Pathology in anatomic and clinical pathology. Dr. Oyama belongs to five professional medical societies, including the American Society for Clinical Pathologists and the College of American Pathologists. He is the author and coauthor of several peer-reviewed articles and abstracts.



University of Oregon (BS), Eugene, OR

Oregon Health & Science University (MD), Portland, OR


Postgraduate Training

Anatomic and Clinical Pathology Residency, Oregon Health & Science University, Portland, OR

General Surgery Internship, Oregon Health & Science University, Portland, OR


Professional Membership

American Society for Clinical Pathology

American Society of Clinical Oncology

College of American Pathologists

Oregon Pathology Association

Portland Area Pathology Association

United States and Canadian Academy of Pathology