Our Physicians

Peter D. Byeff, MD »

Peter D Byeff, MD, graduated cum laude from the University of Pennsylvania where he received a B.A. 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.

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Brian J. Byrne, MD »

Dr. Brian J. Byrne graduated cum laude from Boston College where he received the Joseph Stanton, MD Award given to an undergraduate student who has outstanding character, loyalty, leadership and scholarship. He graduated from Temple University School of Medicine. He completed a residency in Internal Medicine and Hematology and Medical Oncology fellowship at Duke University Medical Center. He is board certified in Hematology, Medical Oncology and Internal Medicine. Dr. Byrne is the Director of Clinical Research and the Director of the Tumor Board at The Hospital of Central Connecticut. Dr. Byrne is regarded by his colleagues as an outstanding and compassionate Hematologist and Oncologist.

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Jason L. Chang, MD »

Dr. Jason L. Chang completed his undergraduate education at Princeton University, where he graduated magna cum laude in the Department of Molecular Biology. He received his medical education at the New York University School of Medicine, and completed his residency in Internal Medicine at NYU Hospitals Center. Dr. Chang served as Clinical Instructor in the Department of Medicine at Bellevue Hospital for a year before returning to complete his fellowship in Hematology and Oncology at NYU Hospitals Center. Dr. Chang participated in clinical melanoma research at NYU, and has co-authored several professional articles and textbook chapters.

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Wylie D. Hosmer, MD »

Dr. Wylie D. Hosmer completed his undergraduate education at Bates College in Lewiston, Maine where he graduated cum laude and was honored with induction into Phi Beta Kappa and Sigma Xi Honorary Research Society. Prior to his matriculation at the Columbia College of Physicians and Surgeons, Dr. Hosmer pursued research activities at the University of California San Francisco in the Department of Internal Medicine. Dr. Hosmer completed a residency in Internal Medicine and a fellowship in Hematology and Oncology at the University of California Los Angeles. He was a recipient of the esteemed Fellowship Teaching Award which is presented annually to a single fellow at the institution to honor dedication to medical education. At UCLA, Dr. Hosmer helped translate laboratory based research findings into clinical trials evaluating novel treatments in lung and pancreas cancer. He has published a number of professional and scientific articles.

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Sarah B. Fleisig, MD »

Dr. Sarah Fleisig graduated with Honors from Brown University in the Program in Liberal Medical Education (PLME), an eight-year program which integrates traditional undergraduate study with medical education at Brown University's Warren Alpert Medical School.  She is co-founder of the Arnold P. Gold Humanism Honors Society, an organization which recognizes excellence in patient care, at Alpert Medical School.  Dr. Fleisig completed her internship and residency at Lenox Hill Hospital, a teaching affiliate of Hofstra Northwell School of Medicine.  She competed fellowship training in Hematology and Medical Oncology at Montefiore Medical Center, the teaching hospital for Albert Einstein College of Medicine.  Dr. Fleisig is board certified in Internal Medicine and board eligibile in Hematology and Medical Oncology.  Her academic contributions have been presented at national conferences and published in educational materials and peer-reviewed journals.  Dr. Fleisig strives to provide patients with  an informative and compassionate experience in the clinic and beyond.

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