Cancer Specialists

Our multidisciplinary, collaborative team ensures you have the best possible care every step of the way. 

  • Breast cancer surgeons
  • Colorectal cancer surgeons
  • Lung cancer surgeons
  • Prostate cancer surgeons
  • Esophageal cancer surgeons
  • Gynecological cancer surgeons
  • Board-certified oncology specialists

Meet Our Team


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Costanzo Di Perna, MD

Medical Director, Dignity Health Cancer
Institute of Greater Sacramento


Serving as Medical Director for Dignity Health Cancer Institute of Greater Sacramento and Chief of Thoracic Surgery at Mercy San Juan Medical Center, Costanzo Di Perna, MD, is board certified in both thoracic surgery and surgery. His clinical interests include lung cancer, minimally invasive thoracic surgery, molecular diagnostics, esophageal cancer, benign esophageal disease and proteomics.
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Ram Lalchandani, MD

Medical Director, Medical Oncology, Dignity Health Cancer
Institute of Greater Sacramento

Ram Lalchandani, MD, is board certified in internal medicine, medical oncology and hematology. Serving as Medical Director of Medical Oncology for Dignity Health Cancer Institute of Greater Sacramento, Dr. Lalchandani earned his medical degree from the University of Connecticut and stayed to complete his internship at the University of Connecticut Hospitals. Dr. Lalchandani completed his residency at Hahnemann Hospitals in Philadelphia, coming to Sacramento for his fellowship at the University of California, Davis Medical Center.
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John Stevenson, MD

Medical Director, Radiation Oncology, Dignity Health Cancer
Institute of Greater Sacramento


In addition to being board certified in radiation oncology, John Stevenson, MD, is a Diplomate of the National Board of Medical Examiners. After completing his residency in radiation oncology at UCLA, he stayed on to serve as assistant clinical professor. He then founded both the UCLA Prostate Implant Program and the Arnold Palmer Prostate Center. Dr. Stevenson’s clinical interests and specialty training include high dose rate brachytherapy; prostate, breast and GYN brachytherapy; stereotactic radiosurgery and IMRT.