Dr. Mehmet Oz, who has been examining suspected fraud inside the federal health insurance marketplace, says hundreds of thousands of questionable accounts showed virtually none of the signs officials would expect from legitimate customers.
And investigators are now looking much deeper into how brokers, federal subsidies, and allegedly fraudulent enrollments may have combined to cost taxpayers billions.
The Enrollment Boom Comes Under Scrutiny
The Affordable Care Act marketplace expanded dramatically during the Biden years.
Beginning in 2021, Washington increased premium subsidies designed to make coverage cheaper for Americans purchasing insurance through Obamacare exchanges.
Enrollment subsequently surged.
The Biden administration repeatedly promoted those figures as evidence that its health care policies were succeeding.
Critics, however, warned that pouring larger subsidies into the marketplace without sufficiently strong verification procedures could create an enormous incentive for abuse.
Insurance brokers generally receive compensation for enrolling customers.
That means every additional enrollee can potentially translate into additional revenue.
The Paragon Health Institute has estimated that millions of ACA marketplace enrollments during the Biden era may have been improper, raising questions about whether government subsidies were being distributed for people who were either ineligible, improperly enrolled, or potentially nonexistent.
Concerns about enrollment fraud were not entirely new.
A CMS fraud risk assessment dating back to 2018 had already identified the misuse or theft of consumer information by brokers as a serious vulnerability facing the federal marketplace.
Yet enrollment would eventually explode to record levels.
Now federal officials are attempting to determine how much fraud was hiding inside those numbers.
Oz Says Hundreds of Thousands of Accounts Raised Red Flags
The investigation took a striking turn when officials began examining accounts suspected of being fraudulent.
More than 1.1 million Obamacare enrollees this year reportedly lacked Social Security numbers, according to figures cited by Oz.
Investigators then focused on approximately 760,000 accounts displaying signs of possible fraud.
Officials attempted to determine whether those supposed customers behaved like actual health insurance consumers.
Had they submitted medical claims?
Had they responded to requests for information?
Could they provide identifying information?
According to Oz, investigators encountered something remarkable.
“There are no human beings involved in these accounts,” Oz told Fox News Digital.
The accounts reportedly produced no meaningful responses.
Many had no claims activity.
And investigators struggled to find evidence of actual people behaving like ordinary policyholders.
If those accounts were created fraudulently, however, money could still move through the system.
Federal subsidies could help pay insurance premiums while brokers could potentially receive commissions connected to the enrollments.
In other words, taxpayers could be spending money even if the supposed customer existed only on paper.
Vance Points to Massive Broker Operation
Vice President JD Vance has also highlighted allegations involving large-scale broker fraud.
One operation cited by the administration allegedly involved approximately 40 brokerage agents and roughly 50,000 questionable enrollments.
That scale matters.
A handful of fraudulent applications could be blamed on isolated bad actors.
Tens of thousands of questionable enrollments connected to one operation suggest something much more organized.
And previous federal prosecutions demonstrate that ACA-related fraud schemes can involve enormous amounts of money.
In November 2025, the Justice Department announced convictions involving the president of an insurance brokerage firm and the CEO of a marketing company in connection with a roughly $233 million ACA fraud scheme.
A South Florida company also pleaded guilty in a separate case involving approximately $141.5 million.
Those cases predated the Trump administration’s broader crackdown.
Oz Wants Broker Conversations Recorded
Oz is now backing a simple safeguard that could make fraudulent enrollment considerably harder.
Record the broker’s conversation with the customer.
Under the new approach, health insurers would work with brokers who maintain recordings documenting their interactions with applicants.
That would create evidence showing whether a customer actually requested coverage and understood what the broker was doing.
Oz questioned why legitimate brokers would object.
“Why wouldn’t you?” Oz said. “What are you nervous about? What are you worried about? Why don’t you want me to hear what you discussed?”
Recordings could be especially important in cases involving unauthorized plan switching or enrollments allegedly completed without a consumer’s knowledge.
Instead of relying entirely on electronic paperwork, investigators would have another way to determine whether a real applicant participated in the transaction.
Billions of Taxpayer Dollars Are at Stake
The administration says it has already recovered approximately $2.2 billion while hundreds of thousands of additional accounts remain under review.
That means the final scope of the problem may not yet be known.
The larger question is how federal officials allowed suspicious enrollment activity to grow alongside the enormous expansion of Obamacare.
The Biden administration pointed repeatedly to record ACA enrollment as a major accomplishment.
But enrollment totals alone cannot demonstrate success if some portion of those accounts was fraudulent, duplicated, improperly subsidized, or created without legitimate customers behind them.
Oz argues that unchecked fraud ultimately threatens the entire insurance marketplace.
“Fraud will destroy Obamacare. You cannot run an insurance business if you have no idea who’s coming in.”
That warning gets to the heart of the controversy.
The issue is no longer simply whether Obamacare enrollment increased under Biden.
It unquestionably did.
The question investigators are now trying to answer is how much of that growth represented Americans legitimately purchasing health coverage — and how much represented brokers or other operators exploiting a taxpayer-funded system that failed to verify exactly who was on the other side of the application.
If investigators ultimately substantiate the administration’s concerns surrounding hundreds of thousands of suspicious accounts, Biden’s celebrated Obamacare enrollment boom could take on a very different meaning.
What was presented to Americans as record participation may also have provided fertile ground for one of the largest health insurance fraud problems Washington has faced in years.
