Phoenix, Arizona

Velocity Clinical Research, Phoenix, Arizona

Velocity's research site in Phoenix frequently conducts clinical trials related, but not limited to, Infectious Diseases, Pediatrics, and Women’s Health. Acquired by Velocity in 2022, this location was founded in 2017 as the third site of MedPharmics Clinical Research.

Located close to I-17 in a medical office building on N 19th Avenue, the site is easily accessible to thousands of patients, including a large group of diverse populations. All trials conducted at the site are performed in accordance with ICH and FDA guidelines, and in compliance with GCP. The Phoenix team is committed to being a resource for study participants, to providing the highest quality of patient care with compassion and kindness, and to advancing medicine through research.

Velocity Clinical Research, Phoenix, Arizona
6707 North 19th Avenue, Suite 105, Phoenix, AZ 85015

Phone: (602) 368-1928


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About Velocity Clinical Research

100,000+ people have a joined a study at Velocity

Many people enjoy the study experience and have joined several clinical trials at Velocity.

Velocity has decades of research experience

With sites that were established as long ago as 1986, Velocity has experts who have supported clinical trials for decades.

Velocity studies are led by healthcare professionals

All clinical trials conducted at Velocity are overseen by the U.S. Food and Drug Administration (FDA).

Our experienced research team in Phoenix

Every clinical trial is overseen by a Principal Investigator – a physician who is responsible for the rights, safety and welfare of the study participants. All physicians at Velocity are board certified in their specialty area(s) and all research staff is trained in clinical research regulations, including GCP and HIPAA. Our clinical research team in Phoenix is dedicated to conducting quality research in a professional and caring environment.

  • Charles Steven Plimpton, MD

    Principal Investigator
    Charles Steven Plimpton, MD completed his undergraduate degree at Arizona State before heading to University of Arizona, where he completed his medical degree in 1988. In 1992, he completed his OBGYN residency in Phoenix, where he has run his private practice for over 30 years. In addition to his private practice, Dr. Plimpton has served as an assistant clinical professor at the Creighton University School of Medicine, Phoenix since 2015 and conducted clinical trials as a principal investigator since 2017 with a focus on women’s health and pediatric vaccines. Dr. Plimpton is a highly respected physician in the community having earned Phoenix Magazine’s “Top Docs” award four times.

  • Carlos Lopez, MD

    Sub Investigator
    Carlos Lopez, MD graduated from medical school in Montemorelos, Mexico in August 1992. He has been a pediatrician since 1999 after he graduated from Pediatric Training Program at Texas Tech University. Dr. Lopez opened his private practice in Phoenix in 2001. Dr. Lopez began working in research in 2017 with a focus on women’s health and pediatric vaccine trials. His hobbies include reading, outdoor activities, and music. He also fluently speaks Spanish and Brazilian Portuguese. He loves to spend time with his family and kids.

  • Iva Tirres, NP

    Sub Investigator
    Iva Tirres, NP has worked in the medical field for 10 years after earning her Bachelor of Science and her Master of Science in Nursing degrees from Grand Canyon University. Pivoting her focus from wound care to infectious diseases, Iva joined the clinical research industry in 2022 as a sub-investigator. In her role as a sub-investigator, Iva has been highly involved in all aspects of the trials at the Phoenix site.

  • Wendy Barrett, MSN, RN

    Site Director
    After many years as a bedside nurse, Wendy Barrett, MSN, RN entered the clinical research industry in 2014 at St. Joseph’s Hospital and Medical Center as a research supervisor before moving on to become the research program manager. She transitioned to a new role at MedPharmics in 2022 as the Director of Clinical Operations, before MedPharmics was acquired by Velocity Clinical Research. Prior to her interest in research, Wendy earned undergraduate nursing degrees from the University of South Dakota and Grand Canyon University. Additionally, Wendy earned her Master of Science in Nursing Administration from Western Governors University.

Complete the form to start your clinical trial journey in Phoenix

Beyond helping advance medicine, you may also:

  • Get care from a local doctor at no cost
  • Learn about new medicines in development
  • Receive study-related medical exams at no cost
  • Get paid for participating (amounts differ for each study)

After you submit your info, a Velocity staff member will review your info. They will contact you to talk about the study, or others that may be right for you.

Health insurance is generally not needed to join a clinical trial.

Remember, there is never an obligation to join — we're here to help you make the best decision.

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Sponsors and CROs

From the leading pharma companies, to the most pioneering biotech startups, Velocity supports those who are exploring new frontiers in human health. Whether you’re ready to conduct a single-site study or a complex, high-volume clinical trial, trust Velocity.

clinical research team

It all starts with people like you.

Without clinical trial participants, it would not be possible to create new medicines, treatments, and cures.