Clinical Research Sites in Maricopa County, AZ

We list 316 clinical research sites serving Maricopa County, AZ: 316 based there and 0 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.

The top-ranked clinical research sites serving Maricopa County, AZ are 21st Century Neurology, 21st Century Neurology, a Division of Xenoscience, Inc., 21st Century Oncology-Scottsdale, 850 Pbc and 850 Phoenix Bioscience Core. The full ranked list, with the official records each provider matched, is on this page.

10 of the top 10 match an active official record: 21st Century Neurology (ClinicalTrials.gov), 21st Century Neurology, a Division of Xenoscience, Inc. (ClinicalTrials.gov), 21st Century Oncology-Scottsdale (ClinicalTrials.gov), 850 Pbc (ClinicalTrials.gov) and 850 Phoenix Bioscience Core (ClinicalTrials.gov), and 5 more on this page. Each badge links to the official record it matched.

By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.

"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.

Common checks are enrollment history in the indication, experienced coordinators, IRB arrangements, start-up time and data quality. ClinicalTrials.gov shows which studies a site has been listed on.