Your Trusted Clinical Research Facility

TOPAZ Clinical Research is a well-known multidisciplinary research site in Apopka, FL. Located in Orange County. We are in a vast demographic community with pediatric, adolescent, adult and geriatric potential subjects. We are the ONLY stand-alone research site established in Apopka. In addition, we work with a wide variety of physicians and health practitioners.

Mission Statement

“With integrity and ethics, our mission is to help improve the lives of the people within our community through research and the development of future medications.” 

Topaz Building

Site Facility

Our center is conveniently located in the heart of Apopka, FL. near hospitals, laboratories, and imaging facilities; which can be outsourced as needed with easily accessible public transportation. 

  • 1-2 patient exam rooms with gynecologic examination capabilities
  • Waiting area
  • Ample parking
  • On-site laboratory
  • On-site lumbar puncture capabilities
  • Temperature-controlled double-locked IP storage
  • Alarm system and security cameras throughout the site
  • Locked cabinets for subject and regulatory documents
  • CRA space with high-speed wireless internet and copier access


  • Centrifuges
  • ECG machine
  • Spirometer
  • Refrigerator
  • -20- and -70-degree freezers
  • Weight scale
  • Dry ice 

Therapeutic Areas

  • Anti-aging Therapy
  • Cardiology/Vascular Diseases
  • Dermatology
  • Endocrinology
  • Family Medicine
  • Gastroenterology
  • Geriatric
  • Healthy Volunteers
  •  Immunology
  • Infections and Infectious Diseases
  • Internal Medicine
  • Musculoskeletal
  • Mental Health
  • Neurology
  • Nutrition and Weight Loss
  • Obstetrics/Gynecology
  • Women’s Health
  • Orthopedics
  • Pediatrics
  • Pharmacology/Toxicology
  •  Podiatry
  • Psychiatry/Psychology
  • Pulmonary/Respiratory Diseases
  • Sexual Disorders
  • Urology
  • Women’s Health

Contact Us

TOPAZ Clinical Research 
2513 E. Semoran Blvd. 
Apopka, FL 32703

Phone: 407-703-4342
Fax: 321-256-5416

Site Contacts

Marjorie Guzman, BHS – Executive Director

Marjorie has 17 years of experience in clinical research and more than 12 years as a Clinical Research Associate (CRA) in various therapeutic areas. She is also experienced as a Study Coordinator, Rater and Regulatory Analyst.


Karla Francisco, BA – Director of Site Operations/Business Development

Karla has over 7 years of experience in clinical research including but not limited to Management, Contracts and Budgets and Business Development.



TOPAZ Clinical Research has an experienced and talented team. We have multiple physicians available to be Principal Investigator or Sub-Investigator in a variety of therapeutic areas. 

  • Emergency Medicine Principal Investigator has over six years in Clinical Research, and has completed over 60 different studies in all stages of Alzheimer’s disease, Parkinson’s disease, Depression, Anxiety, Diabetes, etc.
  • Pediatrics Principal Investigator has a large range of clinical and research experiences working with newborns to teenagers.
  • Forensic and General Psychiatry Principal Investigator is a knowledgeable and experienced psychiatrist. Our Investigator is also a speaker for past and present pharmaceuticals.
  •  Dental Surgery Principal Investigator is well known in our area and has a large practice with availability to the most modern devices; right next door to TOPAZ Clinical Research.

We also have as Sub-Investigator for our trials- a Physician Assistant with years of experience in all phases of research. In addition, we have an extensive database of experienced Medical Physicians with a broad range of specialties that can fill the need of any therapeutic area.


Our team also includes the following individuals; NICU Nurse, Study Coordinators, Certified Raters, Regulatory Specialist, Business Development Department and Patient Recruitment Coordinators. Everyone is GCP Certified and selected individuals are also IATA Certified. TOPAZ Clinical Research provides unsurpassed education/certifications for all employees.  

If you are a Sponsor please contact for Credentials and demographic information.

Additional Information

  • Conveniently located on 436/Semoran Blvd, near shops, mall, and restaurants. 
  • Orlando International Airport is 45 mins - 1 hr from site.
  • Sanford international Airport is 35-45 mins from site. 
  • Holiday Inn Express and a Hampton by Hilton are located 0.5 miles from site.
  • Extra Space Storage located 0.3 miles from site.
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