What We Do

We consistently enroll among the top 5% of all participating sites for clinical studies including NAFLD, NASH, MRSA, ABSSSI, pain, sepsis, community-acquired pneumonia, hospital-acquired pneumonia, diabetes, dermatology, vaccines, CV, influenza, and many others.

Through our corporate-wide commitment to research excellence, it is our goal to improve the process that will bring new medicines to our global community. We will settle for nothing less than changing the paradigm of clinical trials. We will do so by continuing to be on the progressive edge of efficient innovation to become the industry leader.

Meet Our Team

Hoa Tuyet Bui, M.D. - Principal Investigator
Steven Mannis, M.D. - Principal Investigator
J. Scott Overcash, M.D. - Principal Investigator
Heidi Kabler, M.D. - Principal Investigator
Carrie Cardenas, M.D. - Principal Investigator

Physicians/Principal Investigators

All clinical staff are trained and certified in Good Clinical Practice, the Health Insurance Portability and Accountability Act, and on the NIH Protecting Human Research Participants course.

 
Hoa Tuyet Bui, M.D. 
Principal Investigator
 
Dr. Bui serves as a Principal Investigator in Las Vegas. Dr. Bui received her medical degree at University of Missouri School of Medicine, and is board certified in Family Medicine. She is also BLS, ACLS and PALS certified. Her research experience includes, but is not limited to: pneumonia; skin infections; hepatitis; influenza; diabetes; and other infectious diseases. She has clinical experience in general medicine including: pain management; cardiovascular diseases; and dermatology.
 
Carrie Cardenas, M.D.
Principal Investigator
 
Dr. Cardenas serves as a Principal Investigator in La Mesa. Dr. Cardenas received her bachelor’s degree at San Diego State University, medical degree at UC San Francisco, and completed an internal medicine residency at Stanford University Hospital. Dr. Cardenas’ research experience includes, but is not limited to: pneumonia; skin infections; hepatitis; influenza; diabetes; and other infectious diseases.  She has clinical experience in general medicine including: pain management; cardiovascular diseases; and
dermatology.
 
Heidi Kabler, M.D.
Principal Investigator
 
Dr. Kabler joined eStudySite in 2012 and serves as a Principal Investigator at our Las Vegas site. Dr. Kabler completed her Bachelor of Science degree, graduating summa cum laude, from Duquesne University in Pittsburgh, PA. She earned her medical degree from Wright State University School of Medicine in Dayton, Ohio. She went on to complete her residency in Emergency Medicine at Wright State University where she was also named Chief Resident. Dr. Kabler is board certified in Emergency Medicine, and after residency she moved to Las Vegas, NV to practice Emergency Medicine with Fremont Emergency Services. Her clinical research at eStudySite includes Complicated Skin Infections, Clostridium Difficile,  Influenza, Hepatitis C, Diabetes, and Oral Nutritional Supplements.
 
Steven Mannis, M.D.
Principal Investigator
 
Dr. Mannis serves as a Principal Investigator at our Oceanside site and has been an emergency medicine physician for over 25 years. Dr. Mannis also serves as medical director at Vista Detention Facility.  Dr. Mannis received his bachelor’s degree at University of California Santa Cruz, medical degree at Autonomous University of Guadalajara, and completed an emergency medicine residency in Toledo, Ohio at St. Vincent’s and Toledo Hospital. Dr. Mannis’ research experience includes, but is not limited to: skin infections; pneumonia; hepatitis; influenza; diabetes; and other infectious diseases.  He has clinical experience in general medicine including: hypertension; pain management; cardiovascular diseases; dermatology; and pediatrics. 
 
J. Scott Overcash, M.D.
Principal Investigator
 
Dr. Overcash joined eStudySite in 2012 and is a Principal Investigator at our Chula Vista site.  Dr. Overcash is a board certified Emergency Physician with over 10 years of clinical and research experience. He attended the University of North Carolina School of Medicine where he obtained his M.D. degree and completed their highly ranked Emergency Medicine residency program. Dr. Overcash is a Diplomate of the American Board of Emergency Medicine, a Fellow of the American Board of Emergency Medicine, board certified by the American Academy of Anti-Aging, and an active member of the Association of Clinical Research Professionals. His work has been published in national peer reviewed journals including the New England Journal of Medicine.
 
Michael Waters, M.D.
Principal Investigator
 
Dr. Waters serves as a Principal Investigator at our Chula Vista site. Dr. Waters received his medical degree at UC Irvine School of Medicine, and is board certified in Emergency Medicine. His research experience includes, but is not limited to: pneumonia; skin infections; hepatitis; influenza; diabetes; and other infectious diseases.  He has clinical experience in general medicine including: pain management; cardiovascular diseases; and dermatology. 
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