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              Congressional
           ~   Research Service






Pharmacy Benefit Managers: Current Legal

Framework



November 20, 2023

Several bills introduced in the 118th Congress address the rising cost of prescription drugs for American
consumers. Some of these proposals concern the role of pharmacy benefit managers (PBMs), which
facilitate the purchase of drugs through the pharmaceutical distribution chain and administer pharmacy
benefit plans on behalf of health insurers, employers, and others. This Legal Sidebar provides a brief
overview of PBMs' key functions, selected federal and state laws that regulate these entities, and issues
surrounding federal preemption of state laws addressing PBMs. Federal Trade Commission (FTC)
oversight of PBMs is also addressed, and the Sidebar concludes with a sampling of legislative proposals
that address PBM business practices at the federal level, including by placing limitations on spread
pricing, increasing cost transparency, and increasing oversight by the FTC and Department of Health and
Human  Services (HHS).


Introduction to PBMs

Most health insurance plans include prescription drug benefits that help enrollees pay for the cost of drugs
prescribed as part of their care. Prescription drug plans typically include formularies (which list the plan's
covered drugs) and specify different levels of enrollee prescription cost-sharing for drug tiers, ranging
from low-cost generics to more expensive specialty drugs. Enrollees generally fill prescriptions at
network pharmacies that have contracted with health care payers to dispense the drugs for a set payment.
Health care payers, which may include private health insurance plans or government health programs like
Medicare Part D or Medicaid, may contract with PBMs to design and administer prescription drug benefit
plans. In doing so, PBMs design drug formularies, negotiate prescription drug prices with manufacturers,
and contract with network pharmacies. PBMs also operate electronic systems that process prescription
drug claims, calculate enrollee out-of-pocket costs, and reimburse pharmacies for drugs dispensed to
enrollees.
In recent years, vertical integration of PBMs has led to many PBMs being owned by or affiliated with
pharmacy chains, insurance companies, and health care providers. In 2022, the three largest PBMs (CVS
Caremark, part of CVS Health, which owns Anthem; Express Scripts, which is owned by Cigna; and
OptumRx,  which is owned by UnitedHealthcare) processed a large majority of prescription drug claims in

                                                                Congressional Research Service
                                                                  https://crsreports.congress.gov
                                                                                     LSB11080

CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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