John Claro Onate, M.D. for UC Davis Health

John Claro Onate, M.D.


John Claro Onate is not currently accepting new patients. For assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).




Internal Medicine

Locations and Contact

Psychiatry and Behavioral Sciences

Psychiatry and Behavioral Sciences - Behavioral Health Center
2230 Stockton Blvd.
Sacramento, CA 95817

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Additional Numbers

Clinic Phone


Physician Referrals

800-4-UCDAVIS (800-482-3284)

Philosophy of Care

Dr. Onate is strongly interested in the collaboration and integration of psychiatric care and substance abuse treatment in primary care, HIV medicine and Hepatitis C. Additionally he is interested education on interventional psychiatry and using exercise in the treatment of mental illness. He is one of the co-faculty advisors for the UCDSOM Chapter of the Gold Humanism Honor Society.

Clinical Interests

Dr. Onate practices both Internal Medicine and Psychiatry at the Sacramento County Health Center, where he currently is the director of Integrated Behavioral Health. He is co-lead in developing interventional psychiatry through the new Advanced Psychiatric Therapeutics Clinic. He is the lead Electroconvulsive Therapy Specialist in the department and trains psychiatric residents in the procedure. He also is a core faculty member of the nationally recognized UC Irvine Train New Trainers Program for primary care providers. As a faculty member at the University of California Davis School of Medicine he supervises Psychiatry and Combined Internal Medicine-Psychiatry residents along with MD and PA students; addressing the coordination of medical care in uninsured and indigent patients with mental illness and substance disorders.

Research/Academic Interests

Dr. Onate is interested in researching the role of interventional psychiatry procedures and techniques (ECT, TMS and ketamine) in the comprehensive care of severe mental illness such as depression, bipolar disorder and schizophrenia. He is also interested in coordination of medical and psychiatric care in comprehensive patient care.



Undergraduate School

B.S., Biology, University of Southern Mississippi, Hattiesburg MS 1996

Medical School

M.D., University of Mississippi School of Medicine, Jackson MS 2000


Combined Internal Medicine and Psychiatry, Rush University Medical Center, Chicago IL 2000-2001


Combined Internal Medicine and Psychiatry, Rush University Medical Center, Chicago IL 2001-2005

Central California Psychiatric Society President's Award, 2016

Association for Medicine and Psychiatry Service Award, 2014

APA Nancy C.A. Roeske, M.D., Certificate of Recognition for Excellence in Medical Student Education, 2013

Shifa Clinic Preceptor Award-Teaching Award from the Sacramento student run clinic for the uninsured, 2006

Xiong GL, Iosif AM, Suo S, Mccarron RM, Koike A, Onate J, Carter CS. Understanding preventive health screening services use in persons with serious mental illness: how does integrated behavioral health primary care compare? Int J Psychiatry Med. 2015;48(4):279-98. doi:10.2190/PM.48.4.d. PMID:25817524.

Onate J, Hales R, McCarron R, Han J, Pitman D. A novel approach to medicine training for psychiatry residents. Acad Psychiatry. 2008 Nov-Dec;32(6):518-20. doi:10.1176/appi.ap.32.6.518. PMID:19190300.

Bourgeois JA, Ton H, Onate J, McCarthy T, Stevenson FT, Servis ME, Wilkes MS. The doctoring curriculum at the University of California, Davis School Of Medicine: leadership and participant roles for psychiatry faculty. Acad Psychiatry. 2008 May-Jun;32(3):249-54. doi:10.1176/appi.ap.32.3.249. PMID:18467484.

Fancher TL, Kamboj A, Onate J. Interpreting Liver Function Tests. Current Psychiatry. 2007 May;6(5):61-68.  

Onate J. Psychiatric Consultation in Outpatient Primary Care Settings: Should Consultation Change to Collaboration? Primary Psychiatry. 2006 Jun:13(6).

Onate J. HIV/AIDS. Study Guide to Preventive Medical Care in Psychiatry A Case Approach. 2017.

Onate J. HIV/AIDS. Preventive Medical Care in Psychiatry A Practical Guide for Clinicians. 2015.

Onate J. Use of Psychiatric Drugs in Patients With Hepatitis C. Psychopharm Review. 2010 Mar;45(3):17-24.

Onate J, Xiong G, McCarron R. The Primary Care Psychiatric Assessment. Lippincott’s Primary Care Psychiatry, Lippincott Williams & Wilkins. 2009 Apr.