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Byeff, Peter David, MD

Director, George Bray Cancer Center




English, French

Providing the best care to our patients and their companions requires communicating in a way everyone understands. Interpreter services are available 24 hours a day, 7 days a week, 365 days a year. All spoken languages are available, as well as American Sign Language (AS/L).

Accepting New Patients
  • Hematology / Oncology

Areas of Expertise
Gastrointestinal Cancer, Hematologic Cancers, Hematologic Malignancy, Hematological Malignancies, Leukemia, Lung Cancer, Lymphoma, Myelodysplasia, Myelomas


Columbia Presbyterian Medical Center

Georgetown University Hospital

Medical School
John Hopkins University School of Medicine

Georgetown University Hospital

Professional Organizations

  • American Society of Hematology, Member
  • American Society of Clinical Oncology, Member
  • American Medical Association, Member
  • Connecticut State Medical Society, Member


Verified Patient Reviews

5 out of 5 stars

Once again exceptional service from nurses to the doctor. Will always recommend

5 out of 5 stars

Dr Byeff is a fantastic doctor I would highly recommend him to everyone.

5 out of 5 stars

I'm closing in on 2 years daily to weekly visits with DOCTOR PETER BYEFF and find your 'ratings of 5 Very Good' to be LOW for this doctor concerning my care - should be more like a "10" (seriously!)

5 out of 5 stars

Excellent in all areas.

5 out of 5 stars

Only issue is he always runs so late.

5 out of 5 stars

They are the best.

5 out of 5 stars

*Dr. Byeff is the most caring provider by far. He is knowledgeable beyond words & is always willing to go above & beyond for his patients there is none better!

5 out of 5 stars

Dr. Byeff is a great doctor I have been under his care since 2016. I would highly recommend him because of the excellent care he has given me.

Other Reviews from Around the Web

5 out of 5 stars

So far so great - high hopes for my treatment!


Peter D Byeff, MD, graduated cum laude from the University of Pennsylvania where he received a BA degree and was recognized with honors in his major field of study. He graduated from the Johns Hopkins University School of Medicine and served his internship and residency in internal medicine at Georgetown University Hospital. He was a visiting fellow in Hematology-Oncology at Columbia-Presbyterian Medical Center and was awarded the Royal Gibson Award as the outstanding first year fellow. He also received the prestigious Damon Runyon-Walter Winchell fellowship for his research efforts. He is triple Board Certified in Hematology, Oncology, and Internal Medicine.

Since finishing his training at Columbia, Dr. Byeff has been in practice in central Connecticut. He was the first director of the George Bray Cancer Center at the Hospital of Central Connecticut, and was re-appointed to this position in October of 2008. He has been the principal investigator for the Eastern Cooperative Oncology Group and the National Adjuvant Breast and Bowel Project at The Hospital of Central Connecticut. He is an investigator for the Gynecologic Oncology Group. He served on the American Society of Clinical Oncology Workforce Task-force which identified the impending crisis in oncology workforce numbers. He has written a number of scientific papers and is the founding member of the Cancer Center of Central Connecticut. Currently, he is a representative from The Johns Hopkins School of Medicine to the Alumni Council of Johns Hopkins University and serves on its Executive Committee.


Aetna, Anthem, BCBS Medicare, CarePartners of Connecticut, Cigna Healthcare, Colonial Cooperative Care, Community Health Network of Connecticut, Inc., Connecticare, Connecticare Commercial, Connecticare Medicare, Corvel, Coventry, Essence Healthcare, Evercare, First Health Group Corp., Focus, Health Connecticut, Health Direct, Health New England, Healthy Connecticut, Multiplan, Northeast Health Direct, One Health Plan/ Great-West Healthcare, Oxford Health Plans, Prime Health Services, Private Health Care Systems, Inc., Senior Whole Health, United Healthcare, WellCare of Connecticut, Inc.

This information is subject to change at any time. Please check with your insurance provider before scheduling your appointment or receiving services to confirm they are a participating member of the Hartford HealthCare network.