Distinguished Fellow of the American Psychiatric Association (DFAPA), Marcella M. Wilson, MD graduated UCLA's David Geffen School of Medicine in 1985 and completed her psychiatry residency at UC San Diego before opening BE WELL San Diego Psychiatry on the fourth floor of 4060 Fourth Avenue in Hillcrest. Her practice combines adult psychiatry with addiction medicine — a dual scope that handles co-occurring substance use disorders alongside mood and anxiety treatment, distinct from the trauma-and-existential focus carried at Dr. Kai MacDonald - Psychiatrist/Psychotherapist. From a 1985-onward career she has built a referral network into San Diego addiction-medicine programs, with patients moving from detox and intensive outpatient back into long-term medication management at her Suite 445 office. The Suite 445 setup runs as a single-physician practice rather than a multi-clinician team, contrasting with the larger group structure at SD Wellness Group a few blocks away. The most complex cases coordinate buprenorphine or naltrexone medication-assisted treatment with simultaneous antidepressant adjustment for patients carrying comorbid major depression, alcohol use disorder and active trauma history.