The DPMG Staff

Oliver Anthony Press, M.D.

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Dr. Press obtained his medical degree from University of Southern California (USC). He completed his residency in Anatomic and Clinical Pathology followed by a fellowship in Surgical Pathology and Cytology at Los Angeles County + University of Southern California (LAC+USC) Medical Center. Dr. Press is Board-certified in Anatomic and Clinical Pathology and Cytopathology and is CAP certified for Ultrasound-Guided Fine-Needle Aspiration.


Ron Rowberry, M.D.

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Dr. Rowberry joined DPMG in 2002. He obtained his medical degree from St. Louis University, St. Louis, MO. He completed his residency in Anatomic and Clinical Pathology, and a fellowship in Surgical Pathology at the University of California, San Francisco. He is currently the Clinical Laboratory Medical Director and Chairman of the Department of Diagnostics and Therapeutics at Sutter Roseville Hospital, Roseville, CA. Dr. Rowberry is Board certified in Anatomic and Clinical Pathology.


Kristen Vandewalker, M.D.

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Dr. Vandewalker joined DPMG in 2006. She obtained her medical degree at the University of California, Davis, School of Medicine. She also completed her residency in Anatomic and Clinical Pathology at the University of California, Davis. Dr. Vandewalker is Board-certified in Anatomic and Clinical Pathology. She currently serves as the Medical Director and Chief of Laboratory Medicine at Sutter Medical Center Sacramento and the Medical Director of the Sutter Medical Foundation Microbiology Laboratory.



phone-512If you are a clinician and would like to speak to one of our pathologists, please call 916-446-0424.