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UC Davis Children’s Hospital

UC Davis Children’s Hospital

Our hematology and oncology team

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 To Make an Appointment

  • Your child’s physician will make arrangements for an appointment with a hematology or oncology specialist.


  • After hours, weekends and holidays, call (916) 734-2011. Ask for the pediatric hematology-oncology doctor on call.

Team of doctorsWhile our hematology and oncology team consists of highly trained medical specialists, it also includes patients and their family members, working together to achieve improvement and recovery. To ensure the most effective, comprehensive treatment, UC Davis Children's Hospital pediatric hematologists and oncologists coordinate patient care with medical specialists from other disciplines, including orthopedists, neurologists, urologists and radiation therapists. Our multidisciplinary team is made up of pediatric hematologists and oncologists, pediatric resource nurses and a social worker.

Team members

Jonathan M. Ducore, M.D.
Jonathan M. Ducore, chief of Pediatric Hematology/Oncology and medical director of the Pediatric Infusion Center, specializes in tumors of the brain, bones and soft tissues, as well as in cancer epidemiology and pediatric chemotherapy. He has board certifications from the American Board of Pediatrics and from the American Board of Pediatrics in Pediatric Hematology-Oncology. Jonathan Ducore is a member of the American Association for Cancer Research, the American Association for the Advancement of Science, the American Society of Clinical Oncology, the American Society of Hematology, and the Environmental Mutagen Society.

Katherine K. Perez, M.D.
Katherine K. Perez, a specialist in pediatric hematology and oncology, is chief of transplant surgery and director of the Kidney/Pancreas Transplant Program at UC Davis Medical Center. Katherine Perez treats children with cancer and blood conditions, including hemophilia and other bleeding and coagulation disorders, lead poisoning, sickle cell anemia, bone marrow problems, and cancer. She has a board certification from the American Board of Pediatrics, and her professional membership affiliations include the American Academy of Pediatrics.

Arun A. Rangaswami, M.D. — Assistant Professor of Pediatrics

Janice K. Ryu, M.D.
Janice Ryu is interested in breast cancer, gynecological and pediatric malignancies, total body irradiation, soft tissue sarcomas, and brachytherapy. She has a subspecialty in radiation therapy for the treatment of cervical cancer. Janice Ryu has published research on radiotherapy and treatment of breast, prostate, head and neck, and non-small-cell lung cancer.

Douglas S. Taylor, M.D., Ph.D.
Douglas S. Taylor, who specializes in pediatric hematology and oncology, is an expert in pediatric stem cell transplantation, and treatment of fungal infections in children with weakened immune systems. He directs the Pediatric Stem Cell Transplantation Program at UC Davis. He is certified by the American Board of Pediatrics in pediatric hematology-oncology and is a member of the American Medical Society.

Daniel C. West, M.D.
Daniel C. West, director of the Residency Training Program, treats children and adolescents with cancer and all types of blood disorders. Daniel West, who is listed in The Best Doctors in America, has expertise in treating bone tumors—notably Ewing’s sarcoma and osteosarcoma. He is certified by the National Board of Medical Examiners and by the American Board of Pediatrics in pediatric hematology-oncology. He is a member of the American Academy of Family Physicians, the American Association of Pediatrics, the California Chapter of the American Association of Pediatrics, the Association of Pediatric Program Directors, and the Pediatric Oncology Group.

Theodore Zwerdling, M.D.
Theodore Zwerdling, who specializes in pediatric hematology and oncology, is board-certified by the American Board of Pediatrics. He is a member of the American Society of Hematology, the American Society of Pediatric Hematology/Oncology, and the Children's Oncology Group. He is a reviewer for the Journal of Pediatrics, Journal of Pediatric Hematology/Oncology, and Journal of the American Medical Association.