Which countries run stem-cell trials for Parkinson's Disease?

Country distribution

A study with sites in several countries is counted once per country, taken from the location block of each registry record.

What the map means for Parkinson's Disease

Serious work concentrates in a handful of centres in Japan, the US, Europe and China with cell-manufacturing and functional-neurosurgery capability. Nothing about that map supports the intravenous offers sold to Parkinson's patients in tourism markets.

Where recruitment is actually open

What travelling for a trial actually involves

Cross-border participation fails on logistics more often than on eligibility: follow-up schedules, local insurance, visa duration and who pays for complications. A site that cannot answer those in writing is not going to enrol you.

Multi-country studies, named

Registered studies with sites in more than one country — the clearest evidence of collaboration rather than a single-centre series.

• NCT06944522 — A Study to Investigate the Efficacy and Safety of Bemdaneprocel in Adults Who Have Parkinson's Disease (Australia, Canada, United States)

Why trial geography is not a shortlist

Where studies happen reflects who funds and who authorises them. Treating that as a ranking of care quality confuses the research system with the treatment market, two things that overlap far less than medical-tourism marketing implies.

Before treating geography as a shortlist, read the legality overview by country and what "best country" actually means here.

When these studies started

Registrations by start year since 2020: 2020 (4), 2021 (4), 2022 (3), 2023 (7), 2024 (6), 2025 (14), 2026 (8). Activity for this condition spans 2009 to 2026, which shows whether interest is growing, flat or past its peak.

Frequently asked

Which countries run stem-cell trials for Parkinson's Disease?

Sites are registered in 21 countries; the largest is United States (~41% of country mentions, 2026-08-29).

Does a country with many trials mean better treatment there?

No — trial counts describe where research is permitted and paid for. Care quality is decided at the level of the individual provider and product.

Are trial sites and commercial clinics the same thing?

Rarely. Academic trial sites and the private clinics advertising to medical tourists are typically separate organisations with different oversight.

Registry and literature counts retrieved 2026-08-29 (ClinicalTrials.gov API v2; PubMed E-utilities). Registration or publication volume measures research activity, not effectiveness or approval. Educational information — not medical advice; verify product, indication, legal pathway and evidence with an independent qualified physician. Page generated 2026-08-29. See our editorial standards.