Dr. Kretzschmar graduated the medical school from Vanderbilt University School of Medicine and completed his residency program at University of California, San Francisco. He is specialized in Pathology and board certified in Nuclear Medicine and Anatomic Pathology & Clinical Pathology. Dr. Kretzschmar has been in practice for more than 20 years and is affiliated with the Marin General Hospital and the Novato Community Hospital: Sutter Health Affiliate.