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Grivas
Petros Grivas, MD, PhD, FASCO

Petros Grivas, MD, PhD, FASCO

Medical Oncology

  • Medical Director, Local/Regional Outreach, Fred Hutch
  • Medical Director, International Program, Fred Hutch
  • Professor, Clinical Research Division, Fred Hutch
  • Professor, Division of Hematology and Oncology, University of Washington School of Medicine
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About

Dr. Petros Grivas is a board-certified medical oncologist and researcher at Fred Hutch and specializes in treating genitourinary cancers. He leads clinical trials and education efforts focused on advancing new treatments for bladder, prostate and related cancers.

Background

Dr. Grivas cares for patients with genitourinary cancers including bladder, prostate and testicular cancers. He focuses on providing evidence-based, personalized care for people with these diseases.

His research has helped lead to the U.S. Food and Drug Administration (FDA) approval of new drugs for bladder and urothelial cancer. He currently leads studies exploring checkpoint inhibitors, a type of immunotherapy drug that releases the brakes on a patient’s immune system and helps it mount a better response to cancer. Dr. Grivas also co-hosts an annual educational event focused on updates in bladder and urinary tract cancers for patients and their loved ones.

In addition to patient care, Dr. Grivas is the director of UW Medicine’s Genitourinary Cancers Program. In this role, he leads clinical trials, educates oncologists and trainees, and shares new research findings through lectures and publications. He is also the medical director of both Local/Regional Outreach and International Program at Fred Hutch.

Area of Clinical Practice
Genitourinary cancers

Follow Petros Grivas

“At Fred Hutch, I belong to a family of innovative, patient-centered providers.”

— Dr. Grivas

What drew you to oncology?

Ever since I was young, I’ve wanted to help other people. I knew a family friend who was a physician, and he served as a great example of how I could channel this desire, combining knowledge and compassion so that I could be of service to a community. I chose to focus on genitourinary cancers because they’re a set of very common diseases affecting the urinary tract and male reproductive system, so I felt pursuing this specialty would allow me to make a difference in the lives of many. I see this area of oncology as an opportunity to bring together my interest in innovative research and patient care.

How do you like to work with patients?

I am dedicated to providing outstanding cancer care, which to me means taking a personalized approach with each patient and being efficient with time and resources. I hope to learn what brought you in and what your goals and expectations are — both for each visit and in the long term. While I bring a wealth of knowledge about genitourinary cancers and the latest research developments, I also believe that the little things, like a warm smile and a conversation held eye-to-eye, matter a great deal.

Diseases Treated

Bladder Cancer

Prostate Cancer

Testicular Cancer

Languages

English
Italian
Greek

Education and Experience

Fellowship, Hematology/Oncology, University of Michigan

Residency, Drexel University College of Medicine/Hahnemann University Hospital

PhD, Medical Oncology, University of Patras School of Medicine

MD, University of Patras School of Medicine

Board Certification

Medical Oncology, 2013; Internal Medicine, 2010; American Board of Internal Medicine

Clinical Trials

We make promising new treatments available to you through studies called clinical trials led by Fred Hutch physicians and researchers. Many of these trials at Fred Hutch have led to FDA-approved treatments and have improved standards of care globally. Together, you and your physician can decide if a study is right for you.

Find a Clinical Trial by Dr. Grivas

Publications

Many of our Fred Hutch physicians and researchers conduct ongoing research to improve standards of patient care. Their work is evaluated by others in their field and selected for publication to the United States National Library of Medicine, the largest medical library in the world. See scientific papers this Fred Hutch physician has written.

View Dr. Grivas's Publications

Your Care Team

At Fred Hutch, you receive care from a team of providers with extensive experience in your disease. Your team includes physicians, a patient care coordinator, a registered nurse, an advanced practice provider and others, based on your needs. You also have access to experts like registered dietitians, social workers, acupuncturists, psychiatrists and more who specialize in supporting people with cancer or blood disorders. 

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Insurance

Fred Hutch accepts most national private health insurance plans as well as Medicare. We also accept Medicaid for people from Washington, Alaska, Montana and Idaho. We are working to ensure that everyone, no matter what their financial situation, has access to the care they need.

More About Insurance

Stories

All news
Oncology Insights with Dr. Petros Grivas - Episode 17
Oncology Insights with Dr. Petros Grivas - Episode 17 Dr. Lara Davis on sarcoma care, clinical trials and team-based treatment June 30, 2026
Oncology Insights with Dr. Petros Grivas - Episode 16
Oncology Insights with Dr. Petros Grivas - Episode 16 Dr. Marco Mielcarek on making blood and marrow transplants safer and more accessible June 16, 2026
Oncology Insights with Dr. Petros Grivas - Episode 15
Oncology Insights with Dr. Petros Grivas - Episode 15 Exploring neuro-oncology leadership and innovation with Dr. Vyshak Venur June 2, 2026