St. Mark Clinical Trials

Center Information

Franklyn Valcarso
M.D./ Director of Clinical Operations
St. Mark Clinical Trials
7648 Seville Avenue
Huntington Park, CA 90255

St. Mark Clinical Trials

Currently Enrolling Trials

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Therapeutic Areas

Cardiology/Vascular Diseases
Family Medicine
Internal Medicine
Nutrition and Weight Loss
Pulmonary/Respiratory Diseases

Performance Metrics

Number of Studies Conducted: 31
Number of Studies Actually Completed: 31
Number of Active Patients in the Database: 1500+
Regulatory Submission Turn-Around Time: 2 Business Day(s)
Average Number of Total Patients Enrolled: 30
Average Percent of Total Patients Randomized: 60%
Average Percent of ‘Completed’ Studies that met Enrollment Goals: 95%
EDC Capabilities: Yes


St. Mark Clinical Trials is a dedicated Phase II-Phase IV clinical research site which has been conducting research studies since 2009. Our site is located in Huntington Park, CA which is centrally located in Los Angeles County (6 miles from downtown Los Angeles and 30 minutes from LAX). Huntington Park is a small city of approximately 60,000 with a 95% Hispanic population which allows us to effectively recruit studies which target this demographic (i.e. Type II Diabetes Mellitus, Obesity, Hypertension, Coronary Artery Disease, COPD etc.). Furthermore, our central location in Los Angeles gives us access to a population of 3.8 million potential patients. By leveraging our active large patient database (>1500+) and strategic sub-investigator relationships we are able to meet or exceed our recruitment goals 95% of the time. We also strive to provide excellent customer service and support to our CRO's/Sponsor by entering electronic data within 24 hours of a study visit and responding to all sponsor requests/email communications within 1 business day.


Since 2009 St. Mark Clinical Trials has conducted 31 clinical trials in adult, pediatric, and/or geriatric populations. Our current therapeutic areas of interest include:

  • Chronic Obstructive Pulmonary Disease (COPD)
  • Asthma
  • Diabetes Mellitus
  • Obesity
  • Hypercholesterolemia
  • Hypertension
  • Gout
  • Opiate Induced Constipation
  • Vaccines
  • Osteoporosis
  • Osteoarthritis
  • Chronic Low Back Pain
  • Depression
  • Irritable Bowel Syndrome
  • Acne
  • Alzheimer’s Dementia
  • Benign Prostatic Hypertrophy

Previous/Current Sponsors

  • Sanofi-Aventis
  • Merck
  • Boehringer-Ingelheim
  • Furiex
  • GlaxoSmithKline
  • Novo-Nordisk
  • Novartis
  • Forest
  • Ardea Biosciences
  • AstraZeneca
  • Gilead
  • Cubist Pharmaceutics

Previous/Current CRO’s

  • Quintiles
  • PPD
  • Icon
  • PRA
  • Inventiv
  • Parexel
  • Covance
  • INC


3,000 Square Foot Hybrid Private Practice/Clinical Research Site with the following amenities:

  • 4 Patient Exam Rooms
  • Extended Stay Room with Large Screen TV/Recliners for patient comfort
  • Dedicated Monitoring Room with Wifi Access
  • CLIA Waived Dedicated Laboratory with Centrifuges
  • -20 degree freezer
  • Dedicated Locked Refrigerator for Investigational Product Storage
  • Access to Dry Ice
  • EKG Machine
  • Spirometer
  • Digital sphygmomanometer
  • Soehnle Professional Weight Scales
  • On-Site Archiving
  • All equipment calibrated yearly


Peter N. Mattar, M.D.

Joseph W. Zaky, M.D.

Peter N. Mattar, M.D. MPH - Principal Investigator/Sub-I

Peter N. Mattar, M.D., M.P.H. graduated from Loma Linda University School of Medicine in 2005 and completed his residency in Family Medicine at Kaiser Permanente. Dr. Mattar is currently Adjunct Assistant Professor of Medicine at Touro University and a full-time Family Medicine Attending Physician at Citrus Valley Medical Associates. As President of St. Mark Clinical Trials, Dr. Mattar has served as a Principal Investigator on several clinical research protocols. His research interests include Type II Diabetes Mellitus, COPD, Asthma, Opioid Induced Constipation, Depression, Osteoporosis, Irritable Bowel Syndrome, Benign Prostatic Hypertrophy, and Vaccines.

Joseph W. Zaky, M.D. - Principal Investigator/Sub-I

Joseph W. Zaky, M.D. graduated from Mount Sinai School of Medicine in 2004 and completed his residency in Internal Medicine at the UCLA-San Fernando Valley Program. Dr. Zaky is currently Associate Professor of Clinical Medicine with David Geffen School of Medicine at UCLA. As Vice President of St. Mark Clinical Trials, Dr. Zaky has served as Principal Investigator on several clinical research protocols. His research interests include Type II Diabetes Mellitus, Hypertension, Hypercholesterolemia, COPD, Asthma, Obesity, Alzheimer’s Dementia, Chronic Low back Pain, Opiate-Induced Constipation, and Depression.

Amal Y. Zaky, M.D. - Sub-Investigator

Amal Y. Zaky, M.D. graduated from Cairo University Medical Center in 1976. She completed her family medicine post-graduate training at the Wadsworth VA Hospital in 1982. She founded St. Mark Medical Group in 1982 and has been in private practice at this location since then. Dr. Zaky joined our clinical research team in 2010 and has served as a sub-investigator on 26 clinical trials. Her research interests include COPD, Hypertension, Type II Diabetes Mellitus, Hypercholesterolemia, and Vaccines.

Contact Center

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