Medical Information Only. Consult your healthcare provider before enrolling in any clinical trial.
Puerto Rico: above-average open trial sites
8 of 14 in-state trials are recruiting (57%); above the 37% national average by 20 percentage points, with Phase 3 weight.
According to ClinicalTrials.gov-derived indexes, Puerto Rico sits in the lower half of US states by in-state trial count (#52 of 52 states by registered in-state trial count).
Puerto Rico: 14 US clinical trials with in-state sites, 8 recruiting.
Puerto Rico has 14 registered US clinical trials with a study site in-state, 8 of them currently recruiting (above the 37% national average by 20 percentage points). 2 of these trials are in Phase 3 (late-stage) and 1 in Phase 2. The most frequently studied condition in Puerto Rico is Cancer of Pancreas, with 2 linked trials.
Thin-volume Puerto Rico archive
Puerto Rico open-enrollment share is 57% (p100 of states with sites; national baseline 37%). Treat this page as a compact local index (thin-volume · high-open), then jump to recruiting trials or methodology rather than expecting hub-scale coverage.
Above-average open, later-stage tilt
Puerto Rico currently lists 8 recruiting sites across 14 in-state trials (57% open): above the 37% national average by 20 percentage points, so open slots are denser than the registry-wide mix.
- 8
- recruiting now (above-average share)
- 57%
- open vs national baseline
- 2
- Phase 3 rows in this footprint
- 2
- top: Cancer of Pancreas
Recruiting share is above the 37% national average by 20 percentage points. Counts include every study with at least one recorded site in the state. Registry reference only, not medical advice.
Puerto Rico vs all states by indexed in-state trial count
Where this state's ClinicalTrials.gov site count sits among every state with at least one listed trial (coverage density, not care quality)
14 Top 100% in the bottom 1% of 52 states
States, banded by indexed in-state trial count
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov · 2026-08-08
Key findings
What ClinicalTrials.gov does not surface for Puerto Rico on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Puerto Rico open-enrollment share sits above the national baseline.
8 of 14 in-state trials (57.1%) are recruiting, against 37% nationally (+20.1 percentage points). Counts include every study with at least one recorded site in the state.
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San Juan dominates Puerto Rico's trial geography.
San Juan lists 10 of 14 in-state trials (71.4%) across 9 named facilities. Cities need five or more listed trials to appear here; locations are as filed by sponsors.
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Cancer of Pancreas is the most-studied condition in Puerto Rico.
2 of 14 in-state trials (14.3%) list Cancer of Pancreas. That is a local concentration figure, not a national disease ranking.
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One sponsor accounts for a large share of Puerto Rico trials.
HUYABIO International appears on 2 of 14 in-state trials (14.3%). Sponsor identity is as filed on ClinicalTrials.gov.
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3 Puerto Rico trials carry a completed status.
3 of 14 (21.4%) are completed. The open share above is the remainder that still lists recruiting.
By Status
| Status | Trial count |
|---|---|
| Recruiting | 8 |
| Completed | 3 |
| Active | 3 |
By Phase
| Phase | Trial count |
|---|---|
| NA | 6 |
| Phase 1 | 5 |
| Phase 3 | 2 |
| Phase 2 | 1 |
Top Conditions
Top Sponsors
Where trials run in Puerto Rico
San Juan is the only Puerto Rico city with five or more listed trials, carrying 10 of the state's 14 across 9 named sites.
| City | Trials | Listed sites |
|---|---|---|
| San Juan | 10 | 9 |
Distinct trials and named sites per city, as filed with ClinicalTrials.gov; cities under five trials omitted. Vintage 2026-08-08.
Open-share high
Puerto Rico open-enrollment share is 57% (p100 of states with sites; national baseline 37%).
Puerto Rico: open share sits in the high tercile of states
Sites cluster almost entirely in San Juan: 10 of Puerto Rico's 14 indexed trials list a site there, across 9 named locations, and no other city reaches five.
Phase mix: 2 Phase 3 vs 1 Phase 2 (later-stage heavy).
Top condition: Cancer of Pancreas (2 trials); top sponsor HUYABIO International (2).
thin-volume · high-open figures (14 trials · 57% open) describe registry geography under the open-share high read, not clinic capacity or protocol fit. Confirm status on ClinicalTrials.gov before acting.
States near Puerto Rico on open-enrollment share
Cross-state peers under the open-share high read (thin-volume · high-open), not the same-state browse list.
Similar thin-volume peers (± open share)
- Wyoming · 17 trials · 35% recruiting
- Vermont · 191 trials · 31% recruiting
- North Dakota · 235 trials · 19% recruiting
- Montana · 250 trials · 22% recruiting
- South Dakota · 273 trials · 31% recruiting
Similar high-open peers (± trial volume)
- Virginia · 40% recruiting · 2,598 trials
- Utah · 38% recruiting · 1,734 trials
- Texas · 37% recruiting · 9,951 trials
- Wisconsin · 37% recruiting · 1,760 trials
- West Virginia · 36% recruiting · 277 trials