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.
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
555 N. 18th Street, Suite 100, Phoenix, AZ 85006
Phone: (602) 368-1928
Email: info@velocityclinical.com
Find a Clinical Trial in Phoenix
Sign up below to speak with an enrollment specialist about available research studies in Phoenix.
Follow Velocity on Facebook for company updates and more.

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.
-
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. -
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. -
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. -
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
Why join a clinical trial?
- Help advance medicine
- Learn about potential new medicines in development
- Receive study-related medical exams at no cost
- Compensation for participating may be available (amounts my 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.
Submit your info
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.
