Specialists at your service.
  • Physicians each with 15+ years
    of dermatopathology consulting experience

  • Extensive quality assurance peer review

  • Direct courier service for specimen supplies and transport at your convenience

  • 24-hour turnaround for routine biopsies

  • Reports “auto-faxed” directly to the client’s office

  • Local account and client service reps in the field

  • Comprehensive managed care coverage

  • Courtesy insurance or patient billing by our inhouse, multilingual billing department

  • Over 40 immunohistochemistry and special stains onsite

    Dermatopathologists Julia Chan
    and Leonard Valentino, M.D.
    available daily for direct

    All unusual, questionable or
    difficult cases are reviewed by
    multiple pathologists.

    Our CAP-certified histology lab
    produces more than
    100,000 slides each year.


The pathologists of APMG have been providing dermatopathology consultation service since 1956. Today, Dr. Julia Chan and Dr. Leonard Valentino are the pathologists of our dermatopathology service. With over 75 years combined experience, our group is the service of choice for many dermatologists in the counties we serve. We have vast experience in the interpretation of atypical nevi, early state melanoma, and unusual skin neoplasm.


Julia S. Chan, M.D. is board-certified in anatomic and clinical pathology and cytopathology, with expertise in dermatopathology. Recruited from the faculty of the Department of Pathology at the University of California, San Francisco, Dr. Chan has been a principal pathologist in our Los Gatos lab since 1988, specializing in dermatopathology and all aspects of outpatient pathology. A founding partner of the APMG, Inc., Dr. Chan is the current president of the group and also serving as assistant clinical professor at the University of California, San Francisco. Dr. Chan received her M.D. degree from the University of Illinois at Chicago and completed her pathology training at U.C. San Francisco and S.F. General Hospital.

Leonard A. Valentino, M.D., is board-certified in Anatomic and Clinical Pathology, Dermatopathology and Nuclear Medicine. He serves as the Medical Director of the Bone Density Center in Redwood City.  Dr. Valentino received his M.D. degree from Loyola University, Stritch School of Medicine in Chicago, Illinois, and completed his pathology residency at the University of California, San Francisco. 

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