• Hartford HealthCare Medical Group
• Integrated Care Partners
• St. Vincent's Medical Center

Medical School
New York Medical College

Internship
Westchester County Medical Center ‐ Internal Medicine

Residency
Westchester County Medical Center ‐ Internal Medicine

Fellowship
Fred Hutchinson Cancer Center ‐ Bone Marrow Transplant
Brown University School of Medicine ‐ Hematology/Oncology

Verified Patient Reviews

November 25, 2025

I feel like they are looking out for me & act in my best interest.

November 24, 2025

Dr. Zelkowitz is the very best.

November 18, 2025

Dr. Zelkowitz is one of the finest doctors I have ever known. Smart, compassionate and knowledgeable

November 17, 2025

Dr Zelkowitz was very nice and attentive as always

November 01, 2025

Dr. Z is amazing, kind, professional and is so reassuring that he will do what needs to be done to be sure you have the best possible outcome!

Other Reviews from Around the Web

Reviewed on March 22, 2026

Dr. Z earned a place in my family's heart for caring for my mom with such passion and care. Your health is in good care in your hands. I explain all processing and treatment clearly and detailed.

Reviewed on March 14, 2026

Dr. Z is my very breast friend! He is thorough, caring, professional, warm, friendly and simply the best!!

Reviewed on March 09, 2026

Dr. Zelkowitz has been my oncologist for six years. It is with great pleasure that I write a review for him. He is caring, supportive, and without a doubt the best doctor anyone could have on their care team.

Reviewed on March 08, 2026

Dr Z is very kind and caring he takes his time to listen to you and shows genuine concern and provides the best help and references/ referrals. He is down to earth and has a great fun personality. I highly recommend him

Reviewed on February 06, 2026

Dr. Zelkowitz is an excellent oncologist that has the utmost respect and compassion for his patients, while providing exceptional care!

Reviewed on January 26, 2026

Excellent and Above and beyond ..God Bless them!!!✌❤🙏😊

Reviewed on January 20, 2026

Very professional and good listener.

Reviewed on October 23, 2025

Dr. Zelkowitz spent time explaining in detail my treatment and possible side effects. He was very knowledgeable, warm and I had a great experience. I left his office feeling positive, hopeful and ready to beat cancer’s butt.

Reviewed on October 08, 2025

Excellent doctor who is truly caring and takes his time to explain things I highly recommend DR Z.

Richard Zelkowitz, MD, is regional medical director of the Hartford HealthCare Cancer Institute Breast Program in Fairfield Region.

Dr. Zelkowitz is a familiar presence in Fairfield County, having served on the medical staff of Norwalk Hospital since 1997. While there, he served as chief of hematology/oncology and co-director of the cancer center. He also founded and served as medical director of its Smilow Family Breast Health Center.

A staunch patient advocate keenly focused on both their medical and emotional needs, Dr. Zelkowitz initiated the state’s first breast navigator program to help guide patients and families through their cancer journeys. He initiated and developed a lecture series that attracted nationally-recognized speakers, developed a multidisciplinary breast cancer tumor board and launched the state’s first Cold Cap program to prevent alopecia in breast cancer patients receiving chemotherapy.

A consultant with the Memorial Sloan Kettering Cancer Center Department of Medicine, Dr. Zelkowitz is a member of the American Society of Clinical Oncology, the Cancer Care Connecticut Chapter’s Medical Advisory Board, the American Society of Breast Disease and the New York Metropolitan Breast Cancer Group.

He is board-certified in hematology and oncology. Dr. Zelkowitz completed a fellowship in hematology/oncology through the Brown University School of Medicine and a second fellowship in bone marrow transplant through the Fred Hutchinson Cancer Center in Seattle. He earned his medical degree from New York Medical College.

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, 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.

Covered by Financial Assistance policy.