A federal government watchdog has identified more than $105 million in Medicare payments for vascular procedures that raised concerns about medical necessity, according to a report released earlier this month by the Office of Inspector General at the Department of Health and Human Services.
The review, which examined billing data from 2019 through 2023, flagged nearly 140 doctors across the country as having "concerning" billing patterns for office-based vascular treatments. These procedures include stent placements in blood vessels and atherectomies, which involve removing plaque with a bladed catheter. The inspector general's analysis cited a 2023 ProPublica investigation that had previously raised alarms about similar practices.
What the Right Is Saying
Conservative critics have framed the issue differently, emphasizing concerns about government overreach and regulatory burden on physicians. The Association of American Physicians and Surgeons warned against broad-brush policies that could penalize doctors practicing within guidelines. "While any instance of fraud or abuse is troubling, we must be careful not to impose compliance burdens that ultimately reduce seniors' access to necessary care," the group said in a response to the report.
Representative Earl "Buddy" Carter of Georgia, who serves on the House Energy and Commerce Committee, called for careful implementation of any new oversight measures. "We need targeted enforcement against bad actors, not another layer of bureaucracy that makes it harder for legitimate doctors to treat Medicare patients," Carter told reporters. Some Republican lawmakers have also questioned whether CMS has the administrative capacity to implement stricter monitoring without creating delays in patient care.
Medical associations representing vascular specialists have defended the procedures as medically appropriate when performed correctly. The Society for Cardiovascular Angiography and Interventions released a statement noting that peripheral artery disease affects millions of Americans and requires intervention in many cases. "These procedures save lives and prevent amputations," the society said, adding that individual physician billing patterns require careful clinical review rather than statistical analysis alone.
What the Left Is Saying
Democratic lawmakers and healthcare advocates have seized on the findings as evidence of systemic failures in Medicare oversight. Senator Ron Wyden of Oregon, who chairs the Senate Finance Committee, said the report underscores the need for stronger safeguards to protect seniors from unnecessary medical procedures. "Taxpayers deserve confidence that their dollars are going to necessary care, not padding the pockets of bad actors," Wyden said in a statement.
The advocacy group Medicare Rights Center called for immediate action. "This report confirms what many patient safety experts have long suspected—that financial incentives have created an environment where some physicians prioritize revenue over appropriate medical care," the organization stated. Consumer groups including Public Citizen have urged CMS to move quickly on the inspector general's recommendations, arguing that delays leave patients vulnerable.
Progressive health policy analysts note that the problem stems partly from a 2000s-era CMS decision to shift certain procedures from hospitals to outpatient facilities as a cost-containment measure—a change they argue inadvertently created opportunities for overbilling. "The intent was sound, but the implementation lacked adequate safeguards," said Dr. Lisa Boswell, a health policy researcher at Georgetown University's Center for Health Insurance Studies.
What the Numbers Show
The inspector general's report provides specific data on the scope of the problem: Of approximately $500 million in total office-based vascular payments in 2023, roughly $105 million—about one-fifth—was flagged as suspicious for potential medical necessity issues. The most concerning subset involves 26 physicians who each received an average of approximately $3 million in Medicare payments and performed more than four times the average number of procedures per patient compared to similar specialists.
The flagged doctors treated Medicare patients at rates double the specialty average, according to the analysis. Approximately half of the identified practitioners operated in California and Texas. Since 2019, CMS has investigated 15 providers who received overpayments for vascular procedures and has initiated a claims analysis project specifically targeting excessive billing for atherectomies.
According to ProPublica's prior reporting, nearly 1 in 4 patients undergoing these invasive vascular procedures had only mild disease—potentially representing approximately 30,000 cases where treatment may have been premature or unnecessary. The report notes that while overall payments for vascular procedures have decreased in recent years, there has been a marked shift from hospital-based to physician office-based settings.
The Bottom Line
The inspector general recommended that CMS implement systematic monitoring of billing records to identify patterns indicating medically unnecessary procedures and take appropriate enforcement actions against providers who continue problematic practices. The agency has received information on the flagged physicians and been encouraged to work with its program integrity team on further review.
CMS has not yet announced specific policy changes in response to the report but is expected to face pressure from Congress to demonstrate progress before year-end. Patient advocacy groups will be watching for updates to Medicare's local coverage determinations for vascular procedures, which determine which treatments are considered reasonable and necessary under the program. Doctors with billing patterns flagged by the inspector general may face audits, repayment demands, or in cases of confirmed fraud, referral to the Department of Justice.