Richard B. Mertens, MD, PhD

Senior Surgical Pathologist

Phone: 310-423-6623


  • Gastrointestinal and Pancreatobiliary Pathology
  • Breast Pathology

Education and Training

  • Medical and Doctorate degrees: University of California, San Diego, CA
  • Residency: Anatomic and Clinical Pathology, University of Washington Affiliated Hospitals, Seattle, WA
  • Fellowship: Anatomic Pathology, Cedars-Sinai Medical Center, Los Angeles, CA

Medical Board Certifications

  • Anatomic Pathology
  • Clinical Pathology

Clinical and Research Interests

  • Use of immunohistochemistry to determine primary site of origin of metastatic neuroendocrine tumors
  • Distinction of primary breast carcinomas with neuroendocrine differentiation from metastatic neuroendocrine tumors to the breast
  • Characterization of GATA3 expression in epidermal and cutaneous adnexal neoplasms

Awards and Activities

  • CAP Pathologist Spotlight Service Award, College of American Pathologists
  • Golden Apple Awards for Excellence in Teaching, Cedars-Sinai Medical Center


  • Colorectal Cancer Center of Excellence
  • Samuel Oschin Comprehensive Cancer Institute (SOCCI)

Selected Publications

Click here for a list of peer-reviewed publications by Richard B. Mertens, MD