Orange County Blood Cancer Doctors

Amrita Krishnan, M.D., directs the Judy and Bernard Briskin Center for Multiple Myeloma Research at City of Hope's cancer research hospital, seeking to make gains in one of the most rapidly changing areas in cancer research.

Tanya Siddiqi, M.D., is the medical director of the Division of Lymphoma at City of Hope.

Samer Khaled, M.D., is a hematologist-oncologist at City of Hope Duarte in the Los Angeles-area and Medical Director of the Integrated Leukemia Service.

Haris Ali, M.D., is a hematologist-oncologist and professor in the Department of Hematology & Hematopoietic Cell Transplantation.

Julio Cesar Alvarenga, M.D., is Assistant Clinical Professor at City of Hope Orange County Lennar Foundation Cancer Center.

Lisa Lee, M.D., is an Associate Clinical Professor in the Department of Hematology and Hematopoietic Cell Transplantation at City of Hope.

Sarah S. Lee, M.D., is an assistant clinical professor in the Department of Hematology & Hematopoietic Cell Transplantation, who studies precision therapy for plasma cell disorders like multiple myeloma and amyloidosis.

Azra Borogovac, M.D., M.S., is a hematologist at City of Hope Orange County Lennar Foundation Cancer Center. For Dr. Borogovac, the patient is the most important part of the medical team. She sees the opportunity to provide care to people with cancer as a privilege. 

Benjamin Heyman, M.D., is an Associate Clinical Professor specializing in lymphoma and chronic lymphocytic leukemia (CLL) at City of Hope Orange County.

Luke Chen, M.D., is a medical oncologist and hematologist at City of Hope Orange County Lennar Foundation Cancer Center and Seacliff locations. Dr. Chen’s research has explored ways to improve treatment for prostate cancer and other malignancies.

Sudarsan Vishnu Kollimuttathuillam, M.D., is a medical oncologist and hematologist at City of Hope Orange County's Lennar Foundation Cancer Center and Seacliff locations. Dr. Kollimuttathuillan places a priority on offering his patients access to innovative treatments and clinical trial options.

Peter Ngo, M.D., is an assistant clinical professor, Department of Medical Oncology and Therapeutics Research at City of Hope Long Beach Elm and Worsham.

Karla Olmedo, M.D., is a rising star in medical oncology and hematology. Dr. Olmedo is driven by the pursuit of advances in immunology and the promise of cell therapy in effectively fighting cancer. 

Krushangi Patel, M.D., is a highly engaged practitioner who prioritizes not only her patients' physical well-being but also their emotional and spiritual needs.

George Bernard Semeniuk, III, M.D., is a hematologist/oncologist specializing in leukemia, lymphoma and hematopoietic cell transplantation.

Tingting Tan, M.D., Ph.D., is a medical oncologist and assistant clinical professor in the Department of Medical Oncology & Therapeutics Research at City of Hope.

Lihong Wu, M.D., is a medical oncologist and hematologist at City of Hope's Long Beach locations. Dr. Wu has made it her mission to help others triumph over cancer. She prides herself on being there for her patients and finding the best possible treatments for them.

Colton Ladbury, M.D., is a radiation oncologist and assistant clinical professor in the Department of Radiation Oncology at City of Hope.

Richard T. Lee, M.D., is the medical director of the Integrative Medicine Program in the Department of Supportive Care Medicine at City of Hope.

Jessica Cheng, M.D., is among the nation’s few, and Orange County’s only, fellowship-trained experts in cancer rehabilitation medicine. This is a subspecialty of physical medicine and rehabilitation (PM&R) also known as physiatry.