Los Angeles-Area Colorectal Cancer Care Team
At City of Hope, we take a team-based approach to personalize each patient's treatment plan according to their unique situation. Our nationally renowned colorectal physicians work closely with patients and their families to ensure they receive compassionate and dignified care. Our team of experts includes colorectal surgeons, surgical oncologists, medical oncologists, gastroenterologists, radiologists, and pathologists, along with nurses, genetic counselors, nutritionists, and specially trained support staff.
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Colorectal Cancer Leadership

Andreas M. Kaiser, M.D., professor and chief, Division of Colorectal Surgery, Department of Surgery, specializes in colorectal diseases.
Surgeons
Mark Hanna, M.D., is an assistant clinical professor in the Division of Colorectal Surgery, Department of Surgery.

Lily Lai, M.D., is a surgical oncologist and professor in the Division of Colorectal Surgery, Department of Surgery.
Kurt A. Melstrom, M.D., is an associate clinical professor in the Division of Colorectal Surgery, Department of Surgery.

Yasmin Zerhouni, M.D., is an assistant clinical professor in the Division of Colorectal Surgery, Department of Surgery.
Surgical Oncologists

Aziz Ahmad, M.D., is a surgical oncologist in City of Hope's Glendora location.

Moshe Faynsod, M.D., is surgical oncologist at City of Hope South Bay in Torrance, California.

Aaron Lewis, M.D., is a surgeon at City of Hope's South Pasadena and Arcadia locations, specializing in general oncologic surgery.

David Litvak, M.D., M.B.A., is an assistant clinical professor, Department of Surgery.

Specializing in bioengineering and tumor micro-environment in cancer development and progression, Andrew Nguyen, M.D., is an assistant clinical professor in the Division of Surgical Oncology in the Department of Surgery at City of Hope.

I. Benjamin Paz, M.D., is a nationally renowned surgical oncology surgeon, with expertise in breast cancer, gastrointestinal and rectal cancers, and tumors involving the bone and soft tissues.

Heather Player, M.D., is breast and colon cancer surgeon and an assistant clinical professor in the Division of Surgical Oncology at City of Hope. She practices at City of Hope | Antelope Valley and Mission Hills.
Medical Oncologists

Gagandeep Brar, M.D. is an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.

Dani Castillo, M.D. is an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.
Marwan G. Fakih, M.D., is a medical oncologist specializing in gastrointestinal cancers.
Daneng Li, M.D., is a medical oncologist specializing in geriatric oncology and treating gastrointestinal cancers.

Aditya Shreenivas, M.D., M.S. is an assistant clinical professor in the Department of Medical Oncology & Therapeutics Research.
Gastroenterologists

Gregory Idos, M.D., M.S., is a gastroenterologist at City of Hope.
Trilokesh Kidambi, M.D., is a gastroenterologist with a specialty in colorectal cancer screening at City of Hope Duarte.
James Lin, M.D., is highly experienced in the field of endoscopic ultrasound, ERCP and other advanced endoscopy services.

Dupinder Singh, M.D., is a gastroenterologist-hepatologist in the Department of Medicine at City of Hope.
Radiation Oncologists

Yi-Jen Chen, M.D., Ph.D., is a radiation oncologist specializing in gastrointestinal cancers, gynecological cancers and esophageal cancers.


Heather McGee, M.D., Ph.D., is an assistant professor in the Department of Radiation Oncology and Department of Immuno-Oncology at City of Hope.
Interventional Radiologists

Edward Boas, M.D., Ph.D., is an interventional radiologist.


Jason Salsamendi, M.D., is a interventional radiologist and clinical professor in the Department of Diagnostic Radiology at City of Hope.