The Trump administration says it has uncovered what could be a major problem inside the Affordable Care Act (ACA), better known as Obamacare.
Health and Human Services Secretary Robert F. Kennedy Jr. announced that more than one million Obamacare enrollees do not have Social Security numbers associated with their marketplace records, calling the finding a serious warning sign that stronger oversight is needed to protect taxpayer dollars.
The announcement, made alongside Centers for Medicare & Medicaid Services (CMS) Administrator Dr. Mehmet Oz, comes as the administration expands its efforts to investigate fraud, eliminate improper payments, and tighten verification standards across federal healthcare programs.
Trump Administration Raises Questions About Obamacare Oversight
Kennedy argued that the missing Social Security numbers reveal significant weaknesses in how the Obamacare marketplace has been administered in recent years.
According to Kennedy, the previous administration weakened identity verification safeguards that were intended to prevent fraud and ensure only eligible applicants received taxpayer-funded benefits.
“The Obamacare marketplace is plagued by fraud because basic program integrity guardrails were dismantled,” Kennedy said during Saturday’s announcement.
He questioned why taxpayer money should continue flowing through a system that cannot fully verify every enrollee’s identity.
While Kennedy described the missing Social Security numbers as a major warning sign, administration officials have not said that every enrollee without a Social Security number committed fraud.
More Than 19 Million Americans Depend on Obamacare
According to the Department of Health and Human Services, approximately 19.2 million Americans are currently enrolled in Affordable Care Act marketplace plans.
That total has fallen from roughly 23.4 million people in 2025, following the expiration of enhanced premium subsidies that were enacted during the Biden administration.
Administration officials say the enrollment decline reflects broader changes in the marketplace while emphasizing that stronger verification measures are now a top priority.
Dr. Oz Details Alleged Fraud Schemes
Dr. Mehmet Oz said investigators have identified what he described as fraudulent activity involving insurance agents and brokers.
According to Oz, some bad actors allegedly enrolled unsuspecting Americans into Obamacare health plans without their knowledge while using fake identities or incomplete applicant information to collect commissions from insurance companies.
He said many of those plans carried little or no monthly premium, making it less likely consumers would notice they had been enrolled.
Oz also pointed to applications submitted without Social Security numbers as a significant warning sign that should have triggered additional review.
The administration has not released data showing how widespread these alleged schemes may be.
Thousands of Suspicious Enrollments Already Canceled
Kennedy said the Trump administration has adopted a zero-tolerance policy toward healthcare fraud.
Officials say thousands of suspicious Obamacare enrollments have already been removed while additional cases continue to be reviewed.
The administration is also working with insurance companies to cancel policies that investigators determine should never have been approved and recover taxpayer funds that may have been improperly paid.
Protecting Taxpayer Dollars
Kennedy pledged that the administration will continue pursuing individuals responsible for fraudulent enrollment activity.
Oz echoed that message, warning that investigators intend to aggressively target anyone attempting to exploit the federal healthcare system.
“If you’re committing fraud,” Oz said, “don’t walk away—run. We’re going to find you.”
What Happens Next?
The administration is expected to continue reviewing Obamacare enrollment records and implementing stronger identity verification requirements in the months ahead.
Supporters argue the effort will help eliminate waste, protect taxpayer dollars, and ensure healthcare benefits go only to eligible Americans. Critics, however, are expected to scrutinize the administration’s findings and the scope of any proposed reforms as additional information becomes available.
With millions of Americans relying on Affordable Care Act coverage, the outcome of these investigations could play a significant role in shaping future healthcare policy and the ongoing debate over Obamacare reform.