Where Parkinson's Clinical Trials Happen, and Where They Don't

If you live outside a major city, you have probably noticed that most Parkinson's clinical trials seem to happen somewhere else. A promising study opens, you read the details, and every recruiting site is a long drive or a flight away. You are not imagining it. Where a trial runs is one of the least discussed parts of clinical research, and it quietly decides who gets to take part.

This article focuses on the United States, because ClinicalTrials.gov, the public registry these numbers come from, is most complete and reliable for trials based in the US. Right now there are about 165 Parkinson's trials recruiting at US sites. Together they reach 43 states across roughly 170 cities, which leaves around 7 states with no recruiting Parkinson's trial site at all. These figures update every day, and the article itself shows a color-coded map of every US state, shaded by how many recruiting trials it has, with the deserts marked in red. For the interactive version, see the State of Parkinson's Research dashboard.

Why Trials Cluster Where They Do

Clinical trials tend to follow a small number of large academic medical centers. Those centers have the movement disorders specialists, the imaging equipment, the research coordinators, and the track record of enrolling participants on time. When a sponsor plans a trial, they pick sites that can hit their enrollment targets quickly, and that usually means the same well-known hospitals in the same big metro areas. The result is a lopsided map: most US cities that host a Parkinson's trial run only one or two, a handful of big-city medical centers run many, and wide stretches of the country, rural areas in particular, run none.

What a Trial Desert Looks Like

For some of the most promising Phase 3 trials, the ones closest to becoming approved treatments, there may be no recruiting site at all in an entire state. A family in that state has three choices: travel a long way at their own cost, wait and hope a closer site opens, or skip the trial. Most people skip it. That is what we mean by a trial desert. It is not that the research does not exist. It is that the research sits out of reach for people who happen to live in the wrong place.

Why This Matters Beyond Any One Family

Geographic gaps are a health equity problem, and they feed back into the science itself. If trials mostly enroll people who live near big-city medical centers, the results reflect that group. Rural communities, people without the means to travel, and underserved populations end up underrepresented in the data that shapes future treatment. A treatment proven mostly in one kind of patient is a weaker answer for everyone else. There is also a plain fairness point: early access to a potential new treatment should not depend on a ZIP code.

What Is Starting to Change

A few things are shifting. More trials now offer travel reimbursement, lodging, and coordinator support to widen their reach. Decentralized and hybrid trials, which lean on local labs, telehealth visits, and at-home monitoring, are slowly cutting the number of in-person visits a participant needs. Neither fix is universal yet, but both make distance less of a wall than it used to be.

How to Find What Is Reachable for You

You can search Parkinson's trials by city or ZIP code, with a travel radius, on our trials near me page. It sorts studies by how close the nearest site is, so you can see at a glance what is within reach. Our matching tool can narrow the list to trials you may qualify for, and the State of Parkinson's Research dashboard shows where trials are running across the map.

A Public Health Story Worth Telling

The pattern of where Parkinson's research happens, and where it does not, is the kind of thing that rarely gets measured in the open. We think it should be. Tracking these gaps over time, in public, is how patient groups, journalists, and policymakers start to close them. It is also how families come to see that a trial being far away is a solvable problem, not a closed door. For the live picture of where trials are running, see the research dashboard.

Frequently Asked Questions

Are there Parkinson's clinical trials near me if I don't live in a big city?
Maybe. Trials cluster around large academic medical centers, so big metro areas have the most sites, but studies add new locations over time and a growing number offer travel support or remote visits. The fastest way to check is to search by your ZIP code with a travel radius on the trials near me page.
Why are so many Parkinson's clinical trials only in major cities?
Sponsors choose sites that can enroll participants quickly, which usually means established research hospitals with movement disorders specialists and dedicated coordinators. Those are concentrated in a small number of large cities, which leaves rural areas and some entire states with few sites or none for a given trial.
What is a clinical trial desert?
It is an area where people have little or no local access to recruiting trials. For some late-stage Parkinson's trials, an entire state may have no recruiting site, so taking part means long-distance travel that many families cannot manage.
Can I join a Parkinson's trial that is far from where I live?
Often yes. Many trials reimburse travel and lodging, and a growing number use telehealth and at-home monitoring to cut the number of in-person visits. Ask the study coordinator what support is available before you rule a trial out over distance.