Thomas Patrick Trezona , MD

Surgery ,Hematology/Oncology , Medical Oncology and Surgical Oncology

(541) 302-6469

Cascade Surgical Oncology Pc
3783 International Ct Ste 200
Springfield, OR 97477


Dr. Thomas P. Trezona, originally from Portland, received his undergraduate degree from Portland State University in biology. He then attended graduate school at Portland State University receiving a degree in microbial genetics. He received his medical training at Oregon Health Sciences University. General Surgery training followed at Harbor-UCLA Medical Center in Southern California. He received his Surgical Oncology and Medical Oncology fellowship training at the Stehlin Oncology Clinic and Stehlin Foundation for Cancer Research in Houston, Texas. While practicing in Houston in the early 1990's he was awarded the "Houston's Consumer Choice Award for Health Care Providers" as the Physician of the Year. He has been recognized as one of Lane County's Best Doctors in a survey by Eugene Magazine. Most recently he has been acknowledged with the Guardian Angel Award at RiverBend in 2013. Dr. Trezona is an entrepreneur physician, having opened Cascade Surgical Oncology in 1995 as a solo practitioner. Through his steady leadership and skill he has built his medical and surgical practice as a thriving private oncology practice, specializing in the care of people with cancer. He is board certified and an active member of the American College of Surgeons, the American Society for Clinical Oncology, and other national and international Surgical and Oncological societies. He participates in national and regional clinical trials as part of his practice. He served as Surgery Division Chief for 2 years. Dr. Trezona is the only surgical oncologist between San Francisco and Portland specializing in the both the medical and surgical aspects of cancer care.

Gender: Male

Years in Practice: 36 Years

Languages Spoken: English and Spanish

Education & Training

Medical School: Oregon Health & Science University School Of Medicine

Graduation Date: in 1985

Specialties & Hospital Affiliations

Hospital Affiliations:

  • Peacehealth Sacred Heart Medical Center Hospital

Specialties: Surgery ,Hematology/Oncology , Medical Oncology and Surgical Oncology

Health Insurance and Affiliations

  • Aetna Choice POS II
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • CIGNA Open Access Plus
  • Moda Health Beacon
  • Moda Health Community Care Network
  • Moda Health Connexus
  • Multiplan PPO
  • PacificSource PSN
  • PacificSource SCN MRF
  • PacificSource SmartChoice
  • Pacificsource SmartChoice OR MRF
  • PacificSource SmartHealth Oregon Members
  • PacificSource SmartHealth Standard MRF
  • PHCS PPO Kaiser
  • Premera LifeWise Connect
  • Providence Choice Network
  • Providence PPO
  • Regence OR Preferred Provider Network
  • UHC Choice Plus POS
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO

Trezona's Office Information

Fax: (541) 130-2647
Accepting New Patients: Yes
Medicare Accepted: Yes
Medicaid Accepted: Yes

Office Hours:

Mon9:00 AM-5:00 PM
Tue9:00 AM-5:00 PM
Wed9:00 AM-5:00 PM
Thu9:00 AM-5:00 PM
Fri9:00 AM-5:00 PM