Original Investigation
Formulary-Related Insurance Denials of Single-Source Branded Drugs in the United States
Joseph F. Levy, G. Caleb Alexander, Boris Vabson, et al
JAMA Published Online: July 9, 2026
doi: 10.1001/jama.2026.8702
Key Points
Question How frequently are prescriptions rejected because of insurance formulary restrictions in the United States, and how often are the ...
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