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Could losing medicaid flood emergency rooms? a massive data study investigates.

NCT ID NCT00565344

Knowledge-focused Sponsor: Vanderbilt University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 24, 2026 · Last updated Jul 24, 2026

Summary

This study analyzes millions of records from Tennessee and national databases to see whether people who lose Medicaid coverage end up visiting emergency departments more often. Researchers will compare the proportion of ER visits from uninsured and former Medicaid patients before and after disenrollment. The goal is to understand the health impact of losing insurance and whether safety-net emergency rooms need more funding.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If the hypothesis holds, this could provide evidence that losing Medicaid harms health and may support increased funding for emergency safety-net services.
What could go wrong
This is an observational data analysis, not a controlled trial, so it can show associations but not prove cause and effect. Results may vary by state or population.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

5,000,000 people

The number who actually took part.

Start date

Jul 2007

Finished

Jun 2013

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Data will be obtained through two datbases. All patients visiting an ED in Tennessee over a 3 year period are included.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * data will be obtained from the Agency for Healthcare Reimbursement and Quality (AHRQ) Healthcare Utilization Project (HCUP) Exclusion Criteria: * n/a

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Medicaid enrollment status