The 340B program, created under 42 U.S.C. § 256b, requires drug manufacturers to sell outpatient drugs at steep discounts to safety-net hospitals and clinics. Those providers can then bill insurers at full price and keep the difference. In 2010, the Health Resources and Services Administration (HRSA) began allowing covered entities to contract with an unlimited number of outside pharmacies to dispense 340B drugs, and those arrangements have multiplied since.
A University of Pennsylvania study finding that 340B contract pharmacies spread mainly into wealthier, whiter neighborhoods remains one of the most contested pieces of evidence in the fight over the federal drug discount program. The fight has sharpened in 2026 with a federal appeals court split over state contract pharmacy laws, a new Medicare payment proposal and a new Department of Health and Human Services analysis of the program’s incentives. The study, a research letter titled Assessment of US Pharmacies Contracted With Health Care Institutions Under the 340B Drug Pricing Program by Neighborhood Socioeconomic Characteristics, was published June 17, 2022, in JAMA Health Forum, an open-access journal in the JAMA Network.
The Penn researchers used HRSA’s 340B database, Census data and the national provider registry to track 91,740 pharmacies from 2006 through 2019. They found that participation was nearly flat before the 2010 policy change and then surged, so that by 2019, 29.9 percent of all U.S. pharmacies held a 340B contract. Retail pharmacies made up 92 percent of them. The finding that drew the most attention compared how 340B and non-340B retail pharmacies changed between 2011 and 2019. Relative to other pharmacies, the share of 340B contract pharmacies fell 7.0 percent in neighborhoods with a median family income below $45,000 and rose 3.6 percent in neighborhoods at or above $80,000. It also fell in predominantly Black and Hispanic neighborhoods and in the most socially deprived areas, while the change in rural neighborhoods was not meaningful. Meanwhile, retail pharmacies overall grew slightly in disadvantaged areas, which the authors said showed the pattern was specific to 340B contracting.
The authors concluded that the growth was concentrated in affluent, predominantly white neighborhoods. In a Penn Leonard Davis Institute summary, they wrote that discounted drugs “appear to go more and more to pharmacies in wealthier communities” and that large retail chains have benefited. They acknowledged one key limitation: they could not see whether 340B discounts actually reached low-income patients. A patient who lives in a poor neighborhood can still fill a prescription at a pharmacy in a wealthier one.
Hospitals objected immediately. Speaking to 340B Report, American Hospital Association general counsel Melinda Hatton said the study “suffers from many flaws that seriously undermine its reliability.” She called its demographic conclusions misleading because the study did not account for differences among communities, particularly rural areas that may have fewer minority residents. The AHA also pointed out that one author had received pharmaceutical industry grants for other research. The study’s disclosures list industry grants and fees received by Doshi and Li, all reported as unrelated to this work, and the study itself was funded by Penn and federal research grants. Covered entities and their advocates generally argue that contract pharmacy savings fund care for vulnerable patients wherever the pharmacy is located.
Later research has added to the picture. A 2023 study in the American Journal of Managed Care, Income Differences Between Locations of 340B Entities and Contract Pharmacies, looked at 2019 contracts and found that the median household income where a contract pharmacy was located averaged about 35 percent higher than where its covered entity was located. That was true for both hospitals and federal grantee clinics. Its authors acknowledged the study was funded by Gilead Sciences. A 2022 county-level study by Nikpay and colleagues found a split: pharmacies contracting with hospitals tended to be in lower-poverty areas, while those contracting with safety-net clinics were more often in areas with higher uninsured rates.
The data still matter because contract pharmacies are now at the center of the 340B dispute. An October 8, 2026 brief from HHS’s Office of the Assistant Secretary for Planning and Evaluation, Mission vs. Margin: Misaligned Incentives in the 340B Drug Pricing Program, reports that contract pharmacies grew from about 1,300 in 2010 to more than 31,000 by mid-2026. It also reports that five companies, Cigna, CVS Health, UnitedHealth Group, Walgreens and Walmart, account for 77 percent of them. The ASPE brief does not cite the Penn study. It argues more broadly that the program’s financial incentives have drifted from its safety-net mission, and hospital groups dispute that view.
Courts are divided over whether states may force manufacturers to honor 340B pricing at contract pharmacies. On March 31, 2026, a Fourth Circuit panel in PhRMA v. McCuskey upheld a preliminary injunction against West Virginia’s contract pharmacy law, finding it likely preempted by federal law. The Fifth and Eighth Circuits had upheld similar laws in Louisiana and Arkansas. The AHA has urged the full Fourth Circuit to rehear the case, warning that the ruling could jeopardize hospitals that serve low-income patients. The ASPE brief also notes that the Centers for Medicare & Medicaid Services proposed in July 2026 to cut Medicare payment for 340B-acquired drugs, and that HRSA announced a revised 340B rebate pilot on August 3, 2026, after a court paused the original version.
For employers and health plans, the stakes go beyond geography. Under 340B, plans typically pay full price for drugs that covered entities buy at a discount, and the ASPE brief cites an estimate that self-insured employers may face a $5.2 billion cost increase from lost manufacturer rebates. Whether contract pharmacy revenue is reaching the patients the program was designed to help is the question the Penn study raised but could not answer, and it remains unresolved.
