
Dr. Wethey is a board-certified psychiatrist and founder of Mentality Behavioral Health Center in Diamond Bar, California. He earned his medical degree from St. George’s University and completed his psychiatric residency at Kaiser Permanente, Fontana. Dr. Wethey also serves as Medical Director at Canyon Ridge Hospital in Chino.

Gerald is accepting new patients.
Gerald is a board certified, mental health nurse practitioner.

Nancy is a board certified, mental health nurse practitioner

Paul is accepting new patients.
Paul is a board certified, mental health nurse practitioner.

Dr. Shana Garcia is a licensed clinical psychologist, specializing in individual psychotherapy.

Catherine is accepting new patients.
Catherine is a Licensed Marriage and Family Therapist who works with individuals and couples. She is passionate about supporting the Latinx community and helping clients navigate family dynamics, generational challenges, and identity concerns. Catherine uses a integrative, client-centered approach drawi
Catherine is accepting new patients.
Catherine is a Licensed Marriage and Family Therapist who works with individuals and couples. She is passionate about supporting the Latinx community and helping clients navigate family dynamics, generational challenges, and identity concerns. Catherine uses a integrative, client-centered approach drawing from CBT, mindfulness, positive psychology, and strengths-based interventions to create a warm, collaborative, and empowering therapeutic space.
Owner and Founder
Chief Financial and People's Officer
Billing & Office Manager
Medical Assistant and Receptionist
Contact us.
Mentality BHC
750 North Diamond Bar Boulevard, Suite 212, Diamond Bar, CA, USA
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We're excited to be expanding our services to include Transcranial Magnetic Stimulation (TMS).
Availability and eligibility will be determined through clinical assessment.
Contact us to learn more.