City of Hope Orange County Doctors
Meet some of the world’s most acclaimed physician-scientists — with expertise in lung, breast, gastrointestinal, gynecological, genitourinary, blood cancers and more – assembled from across the country. They’re leading next-level cancer treatment and research.
Plastic surgeon Mouchammed Agko, M.D., understands that many cancer survivors want to continue their lives after treatment without physical reminders of the disease. His goal is to help them achieve that — in addition to providing additional aesthetic improvements, if it meets a patient’s needs.

Nairi Berner, M.D., is an Assistant Clinical Professor, Department of Diabetes, Endocrinology & Metabolism.

Tanuja Bhandari, M.D., is a radiation oncologist at City of Hope who is well-versed in all forms of radiation oncology, including intraoperative radiation therapy.
Azra Borogovac, M.D., M.S., is an Assistant Clinical Professor, Department of Hematology & Hematopoietic Cell Transplantation at City of Hope Orange County.
Jennifer Chen M.D., is a Lead Breast Imager and Assistant Clinical Professor, Department of Diagnostic Radiology at City of Hope Orange County.

Jessica Cheng, M.D., is an Assistant Clinical Professor, Department of Supportive Care Medicine at City of Hope Orange County. Dr. Cheng is among the nation’s few, and Orange County’s only, fellowship-trained experts in cancer rehabilitation medicine.
Joshua G. Cohen, M.D., F.A.C.O.G., F.A.C.S., is a board-certified gynecologic oncologist dedicated to offering his patients in Orange County empathy and excellence in clinical care.
Seth Cohen, M.D., is a urologic surgeon with a focus on female pelvic medicine and reconstructive surgery at City of Hope's community practice sites in Glendora and Pasadena.

P. Grace Harrell, M.D., M.P.H., is an associate clinical professor, Department of Anesthesiology.

Cory Hugen, M.D., is an Associate Clinical Professor in the Division of Urology and Urologic Oncology in the Department of Surgery at City of Hope Orange County.
Mohamad N. Barakat, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Barakat focuses on working as a team with fellow experts from across oncology specialties and offering access to leading-edge technology at City of Hope.
Luke Chen, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Chen’s research has explored ways to improve treatment for pancreatic cancer and other malignancies.
Joshua G. Cohen, M.D., F.A.C.O.G., F.A.C.S., is a board-certified gynecologic oncologist dedicated to offering his patients in Orange County empathy and excellence in clinical care.
Sudarsan Vishnu Kollimuttathuillam, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Kollimuttathuillan places a priority on offering his patients access to innovative treatments and clinical trial options.

Christian Co Lu, M.D., M.H.S., is a patient-centric physician with 15+ years of experience in medical care.
Danny Nguyen, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Nguyen is also an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.
Nishan Tchekmedyian, M.D., is a hematologist and medical oncologist at City of Hope's Huntington Beach, Irvine Sand Canyon, and Newport Beach Lido locations.
N. Simon Tchekmedyian, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach, Irvine Sand Canyon, Long Beach Elm locations. Dr. Tchekmedyian is also a clinical professor in the Department of Medical Oncology & Therapeutics Research.
Mohamad N. Barakat, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Barakat focuses on working as a team with fellow experts from across oncology specialties and offering access to leading-edge technology at City of Hope.
Luke Chen, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Chen’s research has explored ways to improve treatment for pancreatic cancer and other malignancies.
Dilruba Haque, M.D., is a medical oncologist and hematologist and an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research. Dr. Haque is located at City of Hope's Irvine Sand Canyon and Newport Beach Fashion Island offices.
Yaser Homsi, M.D., is a hematologist and medical oncologist at City of Hope's Huntington Beach, Irvine Sand Canyon and Newport Beach Fashion Island locations. He is also an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.
Sudarsan Vishnu Kollimuttathuillam, M.D., is a medical oncologist and hematologist at City of Hope's Huntington Beach and Irvine Sand Canyon locations. Dr. Kollimuttathuillan places a priority on offering his patients access to innovative treatments and clinical trial options.

Nikki Zahabi, D.O., is an assistant clinical professor with a strong background in internal medicine and critical care in the Department of Medicine at City of Hope in Duarte, California.

Monzr M. Al Malki, M.D., is an associate professor in the Department of Hematology & Hematopoietic Cell Transplantation and is board certified in internal medicine, hematology and medical oncology at City of Hope.

Ibrahim T. Aldoss, M.D., is a hematologist-oncologist and board certified in internal medicine, medical oncology and hematology. His clinical expertise is in acute lymphoblastic leukemia and acute myeloid leukemia.

Haris Ali, M.D., is an hematologist-oncologist and associate professor in the department of Hematology & Hematopoietic Cell Transplantation.
Dilruba Haque, M.D., is a medical oncologist and hematologist and an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research. Dr. Haque is located at City of Hope's Irvine Sand Canyon and Newport Beach Fashion Island offices.
Yaser Homsi, M.D., is a hematologist and medical oncologist at City of Hope's Huntington Beach, Irvine Sand Canyon and Newport Beach Fashion Island locations. He is also an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.
Misagh Karimi, M.D., is a medical oncologist who is passionate about patient education, appearing frequently at community forums to discuss obesity, the environment and other possible risk factors for cancer.

Edward S. Kim, M.D., M.B.A., is the physician-in-chief of City of Hope Orange County and Vice Physician-in-Chief of City of Hope National Medical Center.

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.
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.

Guido Marcucci, M.D., is professor and chair of the Department of Hematological Malignancies Translational Science and chief of the Division of Leukemia.