Stony Brook welcomes Dr. Kehan Ren to Hematology and Oncology faculty

The Renaissance School of Medicine at Stony Brook posted on February 17, 2026 that Kehan Ren, Ph.D., has joined the Division of Hematology & Oncology as an Assistant Professor of Medicine and will serve as Assistant Director of Basic Cancer Research within the division. The departmental announcement was posted by Internal Medicine on the Department of Medicine News & Events page.

Raymond Bergan posted on LinkedIn that Ren “has recently joined as Assistant Professor in the Division of Hematology/Oncology, Department of Medicine,” and added substantive biographical and research details: “Please join me in welcoming Dr. Kehan Ren to Stony Brook Cancer Center. He has recently joined as Assistant Professor in the Division of Hematology/Oncology, Department of Medicine. He is a basic researcher who comes to us from Northwestern University with NCI R00 funding and his research is at the interface of clonal hematopoiesis, the immune microenvironment and bioinformatics.”

Stony Brook’s Department of Medicine also shared the news via its Instagram account stonybrookdeptofmedicine, stating, “We are pleased to announce that Dr. Kehan Ren has joined @stonybrookmedicine as Assistant Professor of Medicine.” Colleagues responded publicly to Bergan’s LinkedIn post, including Chitra Thakur, PhD — “Welcome Dr. Ren! Wishing you success and many more milestones ahead at Stony Brook Cancer Center.” and Megan Aiello, MPA, RN — “Welcome Dr. Ren! We are so excited to have you on the team.”

The Ren appointment appears alongside a series of personnel items on the Department of Medicine News & Events feed. Other posts attributed to Internal Medicine include the promotion of Abigail T. Chua, M.D., M.P.H., to Clinical Associate Professor of Medicine; the promotion of Sarath G. Nath, M.B.B.S., in the Division of Infectious Diseases to Clinical Associate Professor of Medicine; the promotion of Christopher J. Clarke, Ph.D., in Hematology and Oncology to Associate Professor with tenure; the promotion of Sahar Ahmad, M.D., to Professor of Medicine with tenure in Pulmonary, Critical Care and Sleep Medicine; and the appointment of Rajeev Rohatgi, M.D., FASN, as Chair of Medicine at the Northport VA Medical Center. These postings frame Ren’s arrival within a wave of departmental staffing changes.

Stony Brook institutional notices in the broader materials show leadership reorganizations effective November 1, 2024, including William Wertheim’s promotion to Executive Vice President for Stony Brook Medicine and Konstantinos Spaniolas’s role as President of Stony Brook Community Medical and Meeting House Lane. That administrative context underscores recent institutional personnel movement as Ren joins the faculty and takes on an internal leadership role in basic cancer research.

The departmental announcement and Bergan’s LinkedIn post supply key but incomplete facts: the Renaissance School of Medicine posting gives Ren’s title and his role as Assistant Director of Basic Cancer Research, while Bergan attributes Northwestern University as Ren’s prior affiliation, identifies NCI R00 funding, and characterizes Ren’s research focus as clonal hematopoiesis, the immune microenvironment and bioinformatics. The departmental text does not specify Ren’s prior title at Northwestern, a start date for his Stony Brook duties, details of the R00 award, or whether he will have clinical responsibilities. Stony Brook’s Feb. 17, 2026 announcement places Ren within a concentrated set of departmental promotions and appointments as the university expands its research and clinical leadership across Long Island.