Our Investigators

Principal Investigators

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Augusto Focil, MD, MPH

Internal Medicine
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Oxnard, CA
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Karen Simon, MD

Gastroenterology
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Camarillo & Oxnard, CA
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Carey Chronis, MD, FAAP

Pediatrics
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Ventura, CA
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Sherif Aboseif, MD

Urology
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Oxnard, CA
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Preeti Chopra, MD

Allergy & Immunology
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Ventura & Oxnard, CA
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Koosha Mortazavi, MD

Nephrology
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Oxnard, CA
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Robert Nudelman, MD

Pediatrics
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Westlake Village, CA
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Bradley Hiner, MD

Neurology
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Oxnard, CA
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Paul Nazemi, MD

Ophtalmology
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Oxnard, CA
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Elias A. Tarakji, MD

Gastroenterology
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Arcadia, CA
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Dana Y. Pan, MD

Gastroenterology
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Temple City, CA
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Than Luu, MD

Internal Medicine
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Rosemead, CA
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Dr. Keval Shah, DO

Gastroenterology
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Santa Maria, CA
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Paramjit Benipal, MD

Gastroenterology
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Santa Maria, CA
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Atul Vachhani, MD

Gastroenterology
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Santa Maria, CA
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Sukhpreet Walia, MD

Gastroenterology
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Santa Maria, CA
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Robert Evans, MD

Gastroenterology
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Santa Maria, CA
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Igor J. Nastaskin, MD

Gastroenterology
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Santa Maria, CA
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Kamlesh Desai, MD

Gastroenterology
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Santa Maria, CA
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Alex Harrison, MD

Cardiology
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Santa Maria, CA
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Ragui W. Sedeek, MD

Ophtalmology
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Santa Maria, CA
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Jeffrey Kaplan, MD

Pediatrics
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Santa Maria, CA
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Melinda Jezierski, MD

Family Medicine
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Santa Maria, CA
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Oguchi Nkwocha, MD

Family Medicine
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Castroville, CA
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Bob Peng, MD

Obstetrics and Gynecology
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Salinas, CA
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Olga Padron, MD

Family Medicine
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Greenfield, CA
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Eva Perusquia, MD

Internal Medicine
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Salinas, CA

Our Sub-Investigators

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Sandra Tuero, MD

Urgent Care Medicine
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Oxnard, CA
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Michael Bogseth, MD

Urgent Care Medicine
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Oxnard, CA
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Tony Makhlouf, MD

Rheumatology
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Simi Valley, CA
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Thaidra A. Gaufin, MD

Infectious Disease
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Santa Barbara, CA
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Micha Rojany, MD

Gastroenterology
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Camarillo & Oxnard, CA
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Justin Marasigan, DO

Gastroenterology
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Camarillo & Oxnard, CA
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Kelvin Wong, MD

Urology
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Oxnard, CA
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Kevin Lee, MD

Urology
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Oxnard, CA
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Prashant Verma Jr, MD

Allergy & Immunology
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Ventura, CA
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Steven Ledesma, MD

Nephrology
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Oxnard, CA
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Donald Miller, MD

Gastroenterology
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Oxnard, CA
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Samuel Mourani, MD

Gastroenterology
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Glendora, CA
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Ken Nguyen, MD

Gastroenterology
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San Gabriel, CA
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Tim (Tien-Chun) Chen, MD

Gastroenterology
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Los Angeles, CA
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Kenneth Buch, MD

Gastroenterology
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Encino, CA
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Casey Fu, MD

Gastroenterology
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Pasadena, CA
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James Kao, MD

Gastroenterology
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Arcadia, CA
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Jon Yoshiyama, MD

Family Medicine
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Salinas, CA

Collaborating Groups

Most of our Principal Investigators and medical groups have multiple other doctors that assist with Chart Reviews.