Congress should reconsider breaking up PBMs, experts say

Congress should reconsider breaking up PBMs, experts say

  29 Jun 2025

Bipartisan policies in Congress meant to lower drug costs by targeting middlemen in the pharmaceutical supply chain are likely to run up against a fundamental issue: the three major pharmacy benefit managers’ chokehold on the U.S. drug market, experts said during a drug pricing transparency forum in Washington, D.C. this week.

Influential lawmakers on both sides of the aisle have gotten behind proposals to force more transparency in the sector, delink PBM compensation from the rebates they negotiate with drugmakers, and ban PBMs from profiting off of the difference between what they charge payers and reimburse pharmacies for a drug.

But the so-called “Big Three” PBMs — CVS’ Caremark, Cigna’s Express Scripts and UnitedHealth’s Optum Rx — currently hold almost complete control over how patients access medications and the cost of those drugs.

Going after their business practices without changing that reality won’t help, experts said Wednesday during the Transparency is Rising event hosted by a coalition of small upstart PBMs.

“The solution to this can’t be just to ban existing practices. It has to be to remove the choke points that people have over particular parts of the supply chain,” said Reed Showalter, a former advisor on competition to the White House during the Biden administration and attorney with the Federal Trade Commission.

The PBM ‘pivot’ problem

Caremark, Express Scripts and Optum Rx jointly control 80% of U.S. prescriptions. The companies are all subsidiaries of massive healthcare corporations that also own a major national health insurer and pharmacy business, giving them the ability to influence multiple stages of a drug’s journey from a manufacturer to a patient — and a significant profit motivation to do so, according to experts.

Caremark, Express Scripts and Optum Rx say they use their market power to drive down drug prices for their payer clients and the members they serve.

But that power also allows the Big Three to sidestep past efforts from Washington and the states to affect their business model, Antonio Ciaccia, the president of consultancy 3 Axis Advisors, said.

Ciaccia cited an example from the state of Ohio, which banned spread pricing in its Medicaid program in 2018 after discovering it overpaid PBMs by nearly $225 million in one year due to the practice.

But Ohio didn’t end up saving any money, because the PBMs began paying pharmacies beyond the contractually agreed price and clawing back the difference after the fact, he said.

“What we’re talking about is essentially this: the nimbleness of the industry to pivot around policy reforms,” Ciaccia said.

Instead of targeting specific business practices, Congress and antitrust regulators should instead prioritize weakening the Big Three’s control by reversing years of unchecked integration that have allowed PBMs to find these opportunities for arbitrage, speakers said.

“I’m skeptical when you don’t touch the underlying power of the Big Three PBMs, when they still cover 100 million lives each, when they still have influence over formularies, they’re going to find new avenues to pad their profits,” said Alejandro Molina, a policy advisor for the White House during the Biden administration.

Washington could follow Arkansas’ lead, Molina suggested. In April, the state passed a law preventing PBMs from owning pharmacies in a bid to protect independent pharmacies.

The law, which would force companies like CVS that own both PBMs and pharmacies to divest one or the other, was quickly met with criticism and legal challenges from the PBM industry.

Still, bills with similar provisions were recently introduced in Vermont, Texas and New York, according to the National Community Pharmacists Association.

Some federal lawmakers also support breaking up PBMs. In December, a bipartisan group of legislators introduced a bill that would force PBMs to sell their pharmacy businesses.

There’s a unique window for concrete reform now, given Congress’ attention on the issue and interest from the FTC and the Department of Justice in cracking down on some of the Big Three’s most egregious actions, speakers said.

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