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Gilbert M. Ruiz, M.D, F.A.S.C

Otolaryngologist (ENT)

Sub- Investigator

Da-Thuy Van, D.O


Sub- Investigator


Kundandeep S. Nagi, M.D


Sub- Investigator

Felipe Navas, M.D

Internal Medicine 

Sub- Investigator

Richard C. Garcia , LVN

Sub- Investigator

Clifton White , LVN


Melissa Mageno, M.A, CRC

Clinical Research Coordinator

Heather Welch, M.A, CRC
Clinical Research Coordinator
Erin S. Marshall, CRC  

Clinical Research Coordinator

Elsa G. Paulo, CRC  

Clinical Research Coordinator



Physical examinations
Study related procedures, including
  • Laboratory analysis
  • X-ray exams
  • ECG’s
Payment for time and travel
24 hour/7 day a week on-call staff
Early, late or Saturday appointments can be arranged to accommodate work or school schedule.
Get Paid For Clinical Trial Studies


Carl E. Dukes, M.D, F.A.C.P, 

Internal Medicine and Nephrologist

Principle Investigator 

Robert G. Bass, M.D.

Internal Medicine 

Thomas W. Grabow, M.D.



Hector L. Nevarez, M.D


Sub- Investigator

Izaac A. Zoch, M.D


Sub- Investigator

John J. Nava, M.D

Internal Medicine 

Sub- Investigator

Beneta Parthiban M.S. , CCRC


Site Director/ Regulatory Manager

Connie Lerma, AAS


Budgets, Accounting, Contracts

Daniella Zunigia, M.S.

Budgets, Accounting, Contracts

Nina De Los Santos, M.A

Patient Recruiter 


Leobardo A. Aleman, M.A



 Dr. Leonel Reyes is board certified in Internal Medicine. He graduated from University of Texas Health Science Center at San Antonio and is dedicated to the advancement of the Pharmaceutical and Biotechnical industry through clinical research. Under his guidance we at Sun Research Institute have a proven track record for multi therapeutic areas including device trials, asthma, allergies for adults/children and various other trials at any one time.


Dr Reyes has served as lead investigator for clinical studies relating to all of the following conditions:


  • IBS

  • RA

  • Gout

  • Constipation

  • Neuropathy

  • Heart Burn

  • Lupus

  • Lyme Disease

  • Gastroparesis

  • NASH

  • Obesity 

  • Crohns

  • Migraine 

  • Diabetes Type 2


  • GERD

  • Asthma

  • Hypertension

  • Anemia

  • Influenza

  • Seasonal Allergies

  • Osteoporosis

  • Osteo Arthritis

  • COPD

  • Pain

  • UTI

  • Cardiovascular Disease​​

  • Chronic Kidney Disease 

Leonel Reyes, Jr, M.D
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