Committee Chair Bios

Vivien Chan, M.D.
Orange County Child & Adolescent Psychiatry Committee

As APA Assembly Representative, Dr. Chan is a member of our Executive Council. Please please see the Office Bio page for her bio.

Roula Creighton, M.D.
Chair, Social Committee

As Dr. Creighton is also OCPS President, please see Office Bio page for her bio.

David Davis, M.D.
Co-Chair, Investment Committee

Dr. David Davis has been practicing psychiatry in Orange County for 43 years, and specifically in Newport Beach for 21 years. This means that he has seen just about everything and knows what works.
Dr. Davis differentiates himself from other psychiatrists in a number of ways. He keeps his patients on track, and he does not waste time, reducing overall treatment costs. In the initial evaluation, he tries to discover the root cause of the problem which can often provide significant relief, as well as optimism about improving.

Dr. Davis has many years of training in psychodynamic psychotherapy, which makes him a master of uncovering and understanding the unconscious mental life, such as interpreting dreams.
Dr. Davis is recognized as a premier psychiatrist and was honored to have received The Orange County Magazine – Physicians of Excellence Award for Psychiatry in 2005, 2015, and 2016. Dr. Davis is not only a Diplomate of the American Board of Psychiatry & Neurology, but he is also a Distinguished Life Fellow of the American Psychiatric Association, a designation granted to only a small percentage of psychiatrists.

Dr. Davis has extensive experience in all classes of psychotropic medication management. He utilizes the newest, cutting-edge technologies, such as “GeneSight” and “MYnd Analytics,” to assist him in choosing the medication most likely to work best for his patients. These are much more accurate approaches to prescribing medications than primarily relying on clinical symptoms.

In conclusion, Dr. Davis provides excellence and expertise in both psychotherapy and medication management. He wants to help people to lead happy and fulfilling lives. As a free bonus, he often uses humor to give his patients an easier and more relaxed way to look at their life challenges (valid while supplies last)!

Douglas Kahn, M.D.
Co-Chair, Investment Committee

As Dr. Kahn is also a Councilor for OCPS, please see previous page for his bio.

Anthony M. Kassir, M.D.
Information Technology Committee

Upload: November 30, 2016Anthony M. Kassir, M.D. is a Diplomate of the American Board of Psychiatry and Neurology, Life Fellow of the American Psychiatric Association, and Faculty of the California Institute for Short-Term Dynamic Psychotherapy.

Dr. Kassir was raised in Coronado, California; Dubai; and Saudi Arabia. He attended high schools in Coronado and Switzerland. Following his undergraduate education at the Massachusetts Institute of Technology, where he majored in Biology and minored in Jazz Harmony and Arranging, he worked for a year as a chemist at a biotech company in La Jolla, California. Subsequently he began his medical and postgraduate training at the University of California, Irvine. Dr. Kassir completed his residency in 1999 as Chief Resident at UCI Medical Center’s Neuropsychiatric Institute. Since completing his residency, Dr. Kassir has maintained a private practice in Orange County, California. His practice is located in the city of Newport Beach. His specialties include Intensive Short-Term Dynamic Psychotherapy. With other faculty members of the California Institute for Short-Term Dynamic Psychotherapy, he has provided Continuing Medical Education instruction in the technique of ISTDP to physician audiences.

Dr. Kassir has served as a member of the Executive Council of the Orange County Psychiatric Society since 1998 in a variety of positions including Secretary, Councilor, and his current position, Chair of the Information Technology Committee.

Dr. Kassir engaged in various pursuits over the years including music composition and live performances with rock and jazz bands in Boston and California. Other pursuits have included performance juggling, mountaineering and skiing in the Swiss Alps, and everything Apple and Macintosh.

You are invited visit Dr. Kassir's website at

Nathan Lavid, M.D.
Ethics Committee

Dr. Lavid is a clinical and forensic psychiatrist. He has been on the Ethics Committee for the OCPS since 2003. He received his bachelor’s degree in Microbiology and medical degree from the University of Kansas. He interned and completed his psychiatry residency in the Departments of Medicine, Neurology, Pediatrics, and Psychiatry and Human Behavior at the University of California, Irvine. He then completed a fellowship in forensic psychiatry at the Institute of Psychiatry, Law & Behavioral Sciences at University of Southern California, where he was on Faculty as Clinical Instructor at the Keck School of Medicine of USC. He is licensed to practice medicine in the states of California and New York, Diplomate of the American Board of Psychiatry and Neurology, Distinguished Fellow of the American Psychiatric Association, and Psychiatric Expert for the Medical Board of California. He worked on Diagnostic and Statistical Manual of Mental Disorders (DSM-5) as a Field Trials Collaborating Physician Investigator. A former Review Editor for Frontiers in Forensic Psychiatry, he has authored two books, and multiple book chapters and professional articles in psychiatry. He lives in Long Beach, California.

John Luo, M.D.
Education Committee

Bio coming soon!

Lesley MacArthur, M.D.
Membership Committee

Dr. MacArthur is a Distinguished Fellow of the American Psychiatric Association and has a solo private practice in Newport Beach. Over many years, she has held a number of positions with the Orange County Psychiatric Society.   A strong believer in the role of organized psychiatry in advocating for our patients and our profession, she is dedicated to building and retaining a strong  membership.


Thomas Okamoto, M.D.
Government Affairs Committee

As Dr. Okamoto is also a Councilor for OCPS, please see previous page for his bio.

Alexis Seegan, M.D.
Government Affairs Committee

Bio coming soon!

Alex Wang, M.D.
Information Technology Committee

Alex Wang, MD MBA, is a current psychiatry resident at the University of California Irvine Medical Center. He grew up in San Diego, CA and obtained his undergraduate degree in Biology at the University of California, Davis. He completed his medical school training at the University of California, Irvine, School of Medicine while simultaneously completing his business degree at the Paul Merage School of Business. He received the Outstanding Graduating Student Performance in Psychiatry Award before beginning his residency training at the UC Irvine Medical Center. He has published multiple papers on various topics such as financial literacy and clinical informatics. His interests lie in utilizing information technology to improve the delivery of mental health services while reducing the financial costs for patients and health organizations.

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