Marshall S. Horwitz M.D., Ph.D. Accepting new patients

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Genetic counseling, Hematology, Primary care - internal medicine




Marshall Horwitz, M.D., Ph.D., is a board certified physician and scientist at UW Medicine’s Genetic Medicine Clinic, associate dean of UW Medicine, and a UW professor of Pathology, Medical Genetics, Genome Sciences and Medicine.

Dr. Horwitz’s work, in the clinic and in the lab, is aimed at explaining the genetic origins of disease to develop personalized approaches to cancer prevention and treatment.

Dr. Horwitz earned his M.D. at the UW. He directs the UW’s Medical Scientist Training Program for M.D./Ph.D. students. He is the cancer genetics section editor of the Public Library of Science journal PLoS Genetics and former chair of the NIH Genetics of Health and Disease study section. Dr. Horwitz is a recipient of the Presidential Early Career Award for Scientists and Engineers as well as an NIH Director’s Pioneer Award.

Personal Interests

In his free time Dr. Horwitz enjoys travel, technology and world affairs.

Center on Human Development and Disability (CHDD) at UWMC

1959 NE Pacific St. Seattle, WA 981957720


Audiology, Autism, General cardiology, Genetic counseling

Univ. of Washington, School of Medicine

Medical education, 1990

UW - Dept. of Genetics

Fellowship, Medicine

UW - Division of General Internal Medicine

Internship, Medicine

UW - Division of General Internal Medicine

Residency, Medicine


Board Certifications
  • Clinical Genetics, 1996, American Board of Medical Genetics
  • Internal Medicine, 1993, American Board of Internal Medicine