Dr. Jeremy Larson, D.O. completed a four-year psychiatry residency and then an additional year of specialized Addiction Psychiatry fellowship training — a credential combination that the practice's own materials identify as making Dr. Larson the only addiction-trained physician in the St. George area. He co-founded Foundations Psychiatry with Dr. Kenny Hirschi, D.O., whose clinical specialty is child and adolescent psychiatry, giving the two-physician practice an unusual breadth: full-spectrum psychiatric care from toddlers through seniors, with a board-certified addiction medicine capacity that the broader Southern Utah psychiatric market has historically lacked.
The practice is at 134 N 200 E in downtown St. George — the historic grid, not the highway-commercial strip. Services include psychiatric evaluation, medication management, TMS therapy, Spravato (esketamine) treatment for treatment-resistant depression, and medication-assisted treatment for substance use disorders. Tyler Peterson, PMHNP provides additional clinical coverage. Insurance accepted includes Humana, GEHA, UMR, and Tricare.
**Verification notes** Website live; Dr. Larson listed as owner on BBB profile; addiction psychiatry fellowship credential confirmed via Psychology Today provider directory; Dr. Hirschi named on site; address consistent.