Themis A. Yiaslas, Psy.D. for UC Davis Health

Themis A. Yiaslas, Psy.D.

Health Sciences Associate Clinical Professor, Division of Cardiovascular Medicine

Associate Clinical Professor (Vol.), Department of Psychiatry and Behavioral Science

To see if Themis A. Yiaslas is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Clinical Psychology

Locations and Contact

Additional Numbers

Physician Referrals

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

Clinical Interests

Dr. Yiaslas is a licensed clinical psychologist in the Behavioral Medicine Clinic, at the Sacramento VA Medical Center. He directs the Cardio-Metabolic Disease Reversal Program, an interdisciplinary behavioral/lifestyle modification program adapted from interventions that have resulted in regression of atherosclerotic blockages, confirmed with invasive coronary angiography. He has a special clinical interest in bringing atherosclerotic heart disease reversal interventions into routine clinical practice.

Research/Academic Interests

Dr. Yiaslas’ research and academic interests are in primary and secondary cardiovascular disease prevention interventions and elucidating novel biomarkers that mediate positive treatment outcomes.


Cardiovascular Medicine
General Psychiatry

Undergraduate School

B.S., Neurobiology, Physiology, and Behavioral, UC Davis, Davis CA 2003

Other School

M.S., Clinical Psychology, PGSP-Stanford Psy.D. Consortium, Palo Alto CA 2009

Other School

Psy.D., Clinical Psychology, PGSP-Stanford Psy.D. Consortium, Palo Alto CA 2011


Clinical Psychology, Medical Psychology Track, Phoenix VA Health Care System, Phoenix CA 2010-2011


Clinical Psychology, emphasis in Behavioral Medicine, VA Northern California Healthcare System, Martinez CA 2011-2012

Resident Award for Outstanding Volunteer Clinical Faculty, Department of Psychiatry and Behavioral Sciences, UC Davis School of Medicine, 2014, 2021

Yiaslas TA, Sood A, Ono G, Rogers-Soeder TS, Kitazono RE, Embree J, Spann C, Caputo CA, Taylor J, Schaefer S. The Design and Implementation of a Heart Disease Reversal Program in the Veterans Health Administration: Before and During the COVID-19 Pandemic. Fed Pract. 2020 Dec;37(12):558-565. doi:10.12788/fp.0074. PMID:33424214.

Neavins TM, Murphy CM, Yiaslas TA, Demorest ME. Daily and situational reports of substance use and dating violence among college students: A 10-week prospective study. Addict Behav Rep. 2020 Oct 22;12:100309. doi:10.1016/j.abrep.2020.100309. PMID:33364317.

Yiaslas TA. “Look doctor, I’m a carnivore.” International J Disease Reversal Prevention. 2020;2(2):35-39. doi:10.22230/ijdrp.2020v2n2a175.

Yiaslas TA. The pursuit of arete in medicine and health care. International J Disease Reversal Prevention. 2019;1(2):53-56. doi:10.22230/ijdrp.2019v1n2a105.

Yiaslas TA, Taylor J, Embree J, Schaefer S. Elimination of angina, comprehensive cardiometabolic risk reduction, and 50-pound weight loss in a US Navy veteran with Myasthenia Gravis. International J Disease Reversal Prevention. 2019;1(1):77-83. doi:10.22230/ijdrp.2019v1n1a21.

Yiaslas TA, Kamen C, Arteaga A, Lee S, Briscoe-Smith A, Koopman C, Gore-Felton C. The relationship between sexual trauma, peritraumatic dissociation, posttraumatic stress disorder, and HIV-related health in HIV-positive men. J Trauma Dissociation. 2014;15(4):420-35. doi:10.1080/15299732.2013.873376. PMID:24354509.

Khaylis A, Yiaslas T, Bergstrom J, Gore-Felton C. A review of efficacious technology-based weight-loss interventions: five key components. Telemed J E Health. 2010 Nov;16(9):931-8. doi:10.1089/tmj.2010.0065. PMID:21091286.

Mascola AJ, Yiaslas TA, Meir RL, McGee SM, Downing NL, Beaver KM, Crane LB, Agras S. Framing physical activity as a distinct and uniquely valuable behavior independent of weight management: a pilot randomized controlled trial for overweight and obese sedentary persons. Eat Weight Disord. 2009 Jun-Sep;14(2-3):e148-52. doi:10.1007/BF03327814. PMID:19934630.