Our Investigators

Principal Investigators

Augusto Focil, M.D., M.P.H.

Augusto Focil, M.D., M.P.H.

Internal Medicine
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Oxnard, CA
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Karen Simon, M.D.

Karen Simon, M.D.

Gastroenterology
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Camarillo & Oxnard, CA
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Carey Chronis, M.D., F.A.A.P.

Carey Chronis, M.D., F.A.A.P.

Pediatrics
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Ventura, CA
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Sherif Aboseif, M.D.

Sherif Aboseif, M.D.

Urology
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Oxnard, CA
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Preeti Chopra, M.D.

Preeti Chopra, M.D.

Allergy & Immunology
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Ventura & Oxnard, CA
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Koosha Mortazavi, M.D.

Koosha Mortazavi, M.D.

Nephrology
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Oxnard, CA
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Robert Nudelman, M.D.

Robert Nudelman, M.D.

Pediatrics
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Westlake Village, CA
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Bradley Hiner, M.D.

Bradley Hiner, M.D.

Neurology
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Oxnard, CA
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Pezhman Nazemi, M.D.

Pezhman Nazemi, M.D.

Ophthalmology
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Oxnard, CA
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Nawazish Khan, M.D.

Nawazish Khan, M.D.

Oncology
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Oxnard, CA
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Haimesh I. Shah, M.D.

Phlebology and Wound Care
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Oxnard, CA
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Tony Makhlouf, M.D.

Tony Makhlouf, M.D.

Rheumatology
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Simi Valley, CA
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Elias Tarakji, MD

Elias A. Tarakji, M.D.

Gastroenterology
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Arcadia, CA
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Dana Y. Pan, M.D.

Dana Y. Pan, M.D.

Gastroenterology
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Temple City, CA
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Than Luu, M.D.

Than Luu, M.D.

Internal Medicine
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Rosemead, CA
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Reyneiro Castro, M.D.

Allergy & Immunology
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Pasadena, CA
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Keval Shah, D.O.

Keval Shah, D.O.

Gastroenterology
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Santa Maria, CA
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Paramjit Benipal, M.D.

Paramjit Benipal, M.D.

Gastroenterology
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Santa Maria, CA
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Atul Vachhani, M.D.

Atul Vachhani, M.D.

Gastroenterology
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Santa Maria, CA
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Sukhpreet Walia, M.D.

Sukhpreet Walia, M.D.

Gastroenterology
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Santa Maria, CA
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Robert Evans, M.D.

Robert Evans, M.D.

Gastroenterology
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Santa Maria, CA
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Igor J. Nastaskin, M.D.

Igor J. Nastaskin, M.D.

Gastroenterology
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Santa Maria, CA
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Kamlesh Desai, M.D.

Kamlesh Desai, M.D.

Family Medicine
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Santa Maria, CA
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Alex Harrison, M.D.

Alex Harrison, M.D.

Cardiology
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Santa Maria, CA
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Ragui W. Sedeek, M.D.

Ragui W. Sedeek, M.D., F.A.S.R.S.

Ophthalmology
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Santa Maria, CA
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Jeffrey Kaplan, M.D.

Jeffrey Kaplan, M.D.

Pediatrics
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Santa Maria, CA
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Melinda Jezierski, M.D.

Melinda Jezierski, M.D.

Family Medicine
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Santa Maria, CA
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Daniel Agarwal,, M.D.

Ophthalmology
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San Luis Obispo, CA
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Oguchi Nkwocha, M.D.

Oguchi Nkwocha, M.D.

Family Medicine
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Castroville, CA
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Bob Peng, M.D.

Bob Peng, M.D.

Obstetrics and Gynecology
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Salinas, CA
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Olga Padron, M.D.

Olga Padron, M.D.

Family Medicine
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Greenfield, CA
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Eva Perusquia, M.D.

Eva Perusquia, M.D.

Internal Medicine
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Salinas, CA
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Nadia Arias, M.D.

Nadia Arias, M.D.

Pediatrics
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Salinas, CA
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Georgina Centeno, M.D.

Georgina Centeno, M.D.

Obstetrics and Gynecology
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Salinas, CA
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Terrance Hack, M.D.

Terrance Hack, M.D.

Internal Medicine
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Salinas, CA
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Juana Lucio, M.D.

Juana Lucio, M.D.

Family Medicine
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Salinas, CA
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Armando Moreno, M.D.

Armando Moreno, M.D.

Obstetrics and Gynecology
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Salinas, CA
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Edgar Robles, M.D.

Edgar Robles, M.D.

Family Medicine
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Salinas, CA
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Our Sub-Investigators

Tommy Matin, M.D.

Tommy Matin, M.D.

Family Medicine
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Oxnard, CA
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Michael Bogseth, M.D.

Michael Bogseth, M.D.

Urgent Care Medicine
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Oxnard, CA
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Micha Rojany, M.D.

Micha Rojany, MD

Gastroenterology
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Camarillo & Oxnard, CA
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Justin Marasigan, D.O.

Justin Marasigan, D.O.

Gastroenterology
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Camarillo & Oxnard, CA
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Ali Dana, M.D.

Ali Dana, M.D.

Nephrology
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Oxnard, CA
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Kelvin Wong, M.D.

Kelvin Wong, M.D.

Urology
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Oxnard, CA
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Kevin Lee, M.D.

Kevin Lee, M.D.

Urology
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Oxnard, CA
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Prashant Verma Jr., M.D.

Prashant Verma Jr., M.D.

Allergy & Immunology
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Ventura, CA
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Steven LeDesma, M.D.

Steven LeDesma, M.D.

Nephrology
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Oxnard, CA
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Donald Miller, M.D.

Donald Miller, M.D.

Gastroenterology
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Oxnard, CA
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Jacob Lau, M.D.

Jacob Lau, M.D.

Dermatology
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Oxnard, CA
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Ericka Lan, M.D.

Ericka Lan, M.D.

Neurology
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Oxnard, CA
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Samuel Mourani, M.D.

Samuel Mourani, M.D.

Gastroenterology
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Glendora, CA
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Ken Nguyen, M.D.

Ken Nguyen, M.D.

Gastroenterology
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San Gabriel, CA
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Tim (Tien-Chun) Chen, M.D.

Tim (Tien-Chun) Chen, M.D.

Gastroenterology
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Los Angeles, CA
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Kenneth Buch, M.D.

Kenneth Buch, M.D.

Gastroenterology
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Encino, CA
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Kenneth Hepps, M.D.

Kenneth Hepps, M.D.

Gastroenterology
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Tarzana, CA
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Michael Lai, M.D.

Michael Lai, M.D.

Endocrinology
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Santa Maria, CA
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Casey Fu, M.D.

Casey Fu, M.D.

Gastroenterology
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Pasadena, CA
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James Kao, M.D.

James Kao, M.D.

Gastroenterology
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Arcadia, CA
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Jon Yoshiyama, M.D.

Jon Yoshiyama, M.D.

Family Medicine
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Salinas, CA
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Collaborating Groups

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

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