Simon Tan is a clinical psychologist and neuropsychologist at Stanford University Medical Center, specializing in the diagnosis of developmental, psychiatric, and neurologic disorders. He has spent over ten years conducting both inpatient and outpatient assessments at hospital-based settings and clinics. At Stanford, he is involved in didactic training of psychiatric residents and in providing adult enrichment courses at Stanford Continuing Studies.He is presently Clinical Assistant Professor in the department of Neurology & Neurological Sciences. He also holds faculty teaching appointments at various graduate institutions in the San Francisco Bay area, among them Pacific Graduate University, California Institute for Integral Studies, and Saybrook University. He has given numerous community talks and medical grand rounds to local hospitals on the topic of dementia and dementia-associated disorders.

Tan received a BA in psychology from Dartmouth College and his doctoral degree in clinical psychology from Yeshiva University. He completed an internship in clinical psychology from the Massachusetts Mental Health Center at Harvard Medical School.He then completed a two-year postdoctoral fellowship in clinical neuropsychology at Cambridge Hospital and a one-year postdoctoral fellowship in clinical neuropsychology specializing in behavioral neurology at Beth Israel Deaconess Medical Center, both Harvard affiliates. He is also a Diplomate (Board Certified) in Clinical Neuropsychology from the American Board of Professional Psychology (ABPP). Before coming to Stanford, he was a rehabilitation neuropsychologist at NYU Medical Center aimed at cognitive remediation. Tan credits his parents and Asian cultural heritage for focusing his passion on the elderly population, and what can be done to improve cognitive functioning.