Hassan Kaleem, M.D., is a triple-board-certified physician in hematology, medical oncology, and internal medicine. He brings to Oklahoma Cancer and Blood Specialists more than a decade of attending experience caring for adult patients with cancer and blood disorders, along with prior academic experience as a clinical assistant professor and hospital medicine leader.

Dr. Kaleem provides comprehensive care for patients with solid tumor malignancies, hematologic cancers, and benign blood disorders. His clinical interests include leukemia, lymphoma, multiple myeloma, renal cell carcinoma, breast cancer, and supportive care issues such as transfusion management and anticoagulation. He is known for a thoughtful, patient-centered approach that prioritizes shared decision-making and clear communication throughout the cancer journey.

Dr. Kaleem earned his M.B.B.S. degree from Allama Iqbal Medical College in Lahore, Pakistan, and received ECFMG certification in 2007. He completed his Internal Medicine residency at the University of Illinois, where he served as Chief Resident in his final year. He went on to complete a three-year fellowship in Hematology and Oncology at Texas Tech University Health Sciences Center and University Medical Center in Lubbock, Texas. Earlier in his career, he served as an Academic Hospitalist and Clinical Assistant Professor in the Department of Internal Medicine at the University of Iowa Hospital and Clinics.

Dr. Kaleem has held significant leadership and administrative roles, including service as Chairman of the Institutional Review Board for a major health system and Co-Chairman of a hospital pain management task force. He has contributed to peer-reviewed research published in the Journal of Clinical Oncology and has presented quality improvement work at regional and national meetings. He is a member of the American College of Physicians, the American Society of Clinical Oncology, and the American College of Hematology.