• Hartford HealthCare Medical Group
• Integrated Care Partners
• The Hospital of Central Connecticut

Medical School
John Hopkins University School of Medicine

Internship
Georgetown University Hospital

Residency
Georgetown University Hospital

Fellowship
Columbia Presbyterian Medical Center ‐ Hematology-Oncology

Verified Patient Reviews

January 24, 2026

I have always received excellent care from Dr. Byeff.

January 15, 2026

I feel very cared for by Dr. Byeff and staff - so grateful Dr. Byeff looks out for my well being.

January 01, 2026

Knew her stuff and answered all of my questions

December 13, 2025

Dr Byeff is always outstanding.

November 30, 2025

Dr Byeff is excellent

Other Reviews from Around the Web

Reviewed on March 12, 2026

I have been struggling with chronic iron deficiency for years, and it has been an incredibly difficult journey. Although we got off to a bit of a rocky start, this doctor and his team truly stepped up and took my condition seriously. They acted quickly to put a treatment plan in place and help me move forward with the care I needed. I am extremely grateful to the doctor and his staff for their responsiveness, compassion, and commitment to helping me get my health back on track.

Reviewed on February 18, 2026

Dr Byeff is great have had him for 33 years.

Reviewed on December 08, 2025

It is VERY refreshing to find yet another Doctor with a Strong ABILITY TO THINK and act 'in MY BEST INTEREST'. I am grateful Doctor BYEFF is part of HARTFORD HEALTHCARE and count on his expertise going forward! Big thanks to him and his GREAT STAFF as well. This was posted by: Henry J Lenkiewicz THREE MONTHS later and I remain under constant treatment by Dr. Peter Byeff for a lengthy condition for which he is VERY WELL at the HELM along with a great team HE has assembled for my full anticipated recovery. NO SUBSTITUTE for the VAST EXPERIENCE I am the recipient of! Now, 5/27/2022, adds a couple more months under Dr. PETER BYEFF'S more than CAPABLE 'DOCTOR' hands with strong signs of POSITIVE results.with the many twists, turns, variables & tangents as would NAVY SEALS, ARMY RANGERS or SPECIAL FORCES (all in one PETER BYEFF, MD) along with his very capable staff to include EVERY NURSE operating under his direction and his extremely capable administrative assistant, Anna! HARTFORD HEALTHCARE is FORTUNATE to have such a Medical group to meet (exceed) all challenges! Thank you to ALL! Very thankful I am doing well with the GREAT CARE, concern & direction of Dr. PERTER BYEFF & his TEAM along with all the ONCOLOGY NURSES who never miss a beat. Yeah it's THANKSGIVING 2024 and I post to give thanks to all who have (genuinely) cared for me! GOD bless all! HJL JANUARY 2025 WELL, let's start another year off perfectly and that is my fortunate successful continuation with DOCTOR PETER D BYEFF through all phases of treatment for which I am forever grateful. His abilities are second to NONE! DR PETER D BYEFF stands among the ranks of the VERY BEST - Front Row! Henry Lenkiewicz

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

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.

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