The DPMG Staff

Mary E. Keohane, M.D.


Dr. Keohane joined DPMG in 2001. She obtained her medical degree at the University College, Cork, Ireland. She completed her residency in Anatomic and Clinical Pathology at Mount Sinai Medical Center, N.Y., N.Y., and a fellowship in Surgical Pathology at Henry Ford Hospital, Detroit, Michigan. She currently serves as the Clinical Laboratory Medical Director at Sutter Auburn Faith Community Hospital, Auburn, CA. Dr. Keohane is Board certified in Anatomic and Clinical Pathology.

Han S. Lee, M.D., Ph.D


Dr. Lee joined DPMG in 2016. He received his medical and graduate degrees from the University of Cincinnati College of Medicine. He completed his residency in Anatomic Pathology followed by fellowships in both Neuropathology and Surgical Pathology from the University of California San Francisco. Prior to joining DPMG, Dr. Lee served as Assistant Professor of Anatomic Pathology at UCSF and the San Francisco VA Medical Center. He continues to function as a Adjunct Assistant Professor at UCSF, where he contributes to medical student and resident teaching. Dr. Lee is Board-certified in Anatomic Pathology and Neuropathology.

Derek K. Marsee, M.D., Ph.D.


Dr. Marsee joined DPMG in 2010 and has served as President since 2012. He received his medical and graduate degrees from the Ohio State University. Dr. Marsee completed his residency in Anatomic Pathology and a fellowship in Hematopathology at the Brigham and Women’s Hospital in Boston, Massachusetts, as well as a fellowship in Dermatopathology in the Combined Harvard Dermatopathology Program (Beth Israel Deaconess Medical Center, Brigham and Women’s Hospital, and Massachusetts General Hospital). Dr. Marsee is Board certified in Anatomic Pathology, Hematopathology, and Dermatopathology. Dr. Marsee currently serves as the President of the California Society of Pathologists.

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