Dr. Matthew Sirott graduated from a six-year medical program, receiving his B.A. from Lehigh University and his M.D. from the Medical College of Pennsylvania. After completing a three-year residency in Internal Medicine at Montefiore Medical Center of the Albert Einstein College of Medicine in New York City, he completed his oncology fellowship at Memorial Sloan-Kettering Cancer Center and his hematology training at New York Hospital, Cornell University Medical Center.
At John Muir Medical Center, Dr. Sirott served as the Chairman of the Pharmacy & Therapeutics Committee for twelve years and the Chairman the Cancer Committee and Director of Oncology for fourteen years.
Dr. Sirott has been in private practice in Walnut Creek since 1992. He founded Diablo Valley Oncology and Hematology Medical Group and continues to serve as the President and CEO. Under his leadership in 2008, Diablo Valley Oncology opened the state-of-the-art California Cancer and Research Institute, in which all cancer treatment services can be delivered in one location, greatly simplifying a patient’s course of therapy.
Dr. Sirott has a special interest in the treatment of skin cancers.
Yelena Krupitskaya, MD - Medical Oncologist
Dr. Krupitskaya received her medical degree from the Albert Einstein College of Medicine, in Bronx, New York and completed her internship and residency in Internal Medicine at Montefiore Medical Center, a University hospital of Albert Einstein. Dr. Krupitskaya then completed her Hematology and Oncology fellowship at Stanford Medical Center where she helped design clinical trials using novel therapies.
She has a special interest in the treatment of skin cancers and speaks English, Russian and Spanish.
Susan Kao, MD - Medical Oncologist
Dr. Kao has been practicing medicine for over ten years. She began practicing medicine as a hospitalist at Kaiser Permanente Medical Center in Oakland in 2005. After fellowship, she was a clinical instructor at Stanford University School of Medicine. In 2009, Dr. Kao started practicing hematology and oncology at the Veterans Affairs Health System in Palo Alto and Livermore.
In 2012, she joined the East Bay Physicians Medical Group at Alta Bates Summit Comprehensive Cancer Center in Berkeley. She received her medical degree from the University of California, San Francisco and completed her internship and residency in Internal Medicine at the University of California, Los Angeles. Dr. Kao then completed her Hematology and Oncology fellowship at Stanford Medical Center and completed a Leukemia fellowship at Princess Margaret Hospital in Toronto Canada.
She has a special interest in the treatment of melanoma and non-melanoma skin cancers. She speaks English, Chinese Mandarin and Spanish
Christine Chung, MD - Radiation Oncologist
Christine Chung, MD completed her Bachelor of Arts in English Literature from Harvard-Radcliffe College and received her medical degree from Harvard Medical School. She has received numerous honors, including an NCI Cancer Prevention Fellowship and a Fulbright Fellowship to Oxford. She also holds a Masters in Health Policy from the Harvard School of Public Health.
Dr. Chung completed her radiation oncology residency at the Harvard Radiation Oncology Program, where she served as chief resident. The program’s training institutions included the Dana Farber Cancer Institute, Brigham and Women’s Hospital, Boston Children’s Hospital, and Massachusetts General Hospital.
Sravana Chennupati, MD - Radiation Oncologist
Dr. Sravana Chennupati completed his Bachelor of Arts in Molecular and Cell Biology from University of California, Berkeley and received his medical degree from Stanford Medical School. He completed his radiation oncology residency at Oregon Health and Sciences University, where he served as chief resident for two years. As a resident radiation oncologist, he trained in the most advanced techniques of radiation treatment and published several journal articles on prostate, pediatric, and GI malignancies.
Dr. Chennupati has authored several book chapters and has presented his research at international meetings. He has been recognized for outstanding clinical service by the Knight Cancer Institute and has traveled to India to study the delivery of radiation in Hyderabad. He has a special interest in the treatment of skin cancers.
James Rembert, MD - Radiation Oncologist
Dr. James Rembert graduated magna cum laude from Harvard University with a degree in biochemistry. He was a research scientist at Massachusetts General Hospital prior to receiving his medical degree from the University of Pennsylvania School of Medicine where he was inducted into the AOA Honor Society and received the Merck Award for academic excellence. He completed his residency in radiation oncology at UCSF, where he also served as chief resident.
After residency, Dr. Rembert began practice at Alta Bates Comprehensive Cancer Center in Berkeley, CA. While at Alta Bates, he helped establish their stereotactic radiosurgery program. He has served as the Chair of Clinical Services at Alta Bates, and currently is the acting medical director of radiation oncology at ABSMC.
Dr. Rembert has published articles and book chapters on multiple topics in radiation oncology and has a special interest in the treatment of skin cancer. Dr. Rembert was selected by his peers, and recognized in San Francisco magazine, as one of the Bay Area’s “Top Doctors” in 2016, '17 & '18.
Sophia Rahman, MD - Radiation Oncologist
Dr. Sophia Rahman was accepted into the accelerated Bachelors of Science/Medical Degree program at the University of California, Riverside. She received a B.S. in Biomedical Sciences and graduated Magna Cum Laude. She received her Medical Degree from the University of California, Los Angeles David Geffen School of Medicine. After graduating from medical school, Dr. Rahman completed an Internal Medicine residency followed by a Radiation Oncology residency at the Kaiser Permanente, Los Angeles Medical Center.
Dr. Rahman has presented at American Society of Therapeutic Radiation Oncology (ASTRO) and American Radium Society (ARS), major national radiation conferences. She promotes education in the community by speaking to groups on cancer related topics and is an avid supporter of the American Cancer Society and the Cancer Support Community. Dr. Rahman joined Diablo Valley Oncology and Hematology Medical Group in 2012. She has a special interest in the radiation treatment of skin cancers.
Arash Mohebati, MD, FACS - Surgeon
Dr. Mohebati received his medical degree and residency training from the Robert Wood Johnson Medical School in New Brunswick, New Jersey. He has advanced training in head and neck surgical oncology from Memorial Sloan Kettering Cancer Center in New York.
Dr. Mohebati is board certified in General Surgery and a Fellow of the American College of Surgeons and a member of the American Head and Neck Society and American Thyroid Association. He has a special interest in Melanoma surgery and advanced training in head and neck surgical oncology. Dr. Mohebati has extensive training in laparoscopic and minimally invasive surgery. Dr. Mohebati speaks fluent Farsi.
Steven M. Young, MD, FACS - Surgeon
Dr. Young received his medical degree from New York Medical College in New York. He completed his residency in general surgery at St. Barnabas Medical Center in Livingston, New Jersey and his fellowship at Beth Israel Medical Center in New York. Dr. Young is Board Certified in General Surgery and a Fellow of the American College of Surgeons.
He has extensive training in laparoscopic, robotic and minimally invasive surgery as well as complex surgery for trauma and other serious conditions. His special interest is Melanoma surgery.
Charleen Lee Kim, MD, FACS - Surgeon
Dr. Kim received her medical degree from St. Louis University School of Medicine in St. Louis, Missouri. She completed her internship and residency in general surgery at Kern Medical Center in Bakersfield, California. Dr. Kim is board certified in General Surgery, a Fellow of the American College of Surgeons and a member of the American Society of Breast Surgeons.
She has extensive training in skin cancer treatment, laparoscopic and minimally invasive surgery as well as complex surgery for trauma and other serious conditions. Dr. Kim is fluent in Spanish and conversational in Korean.