Medicare Part D Costs for GLP-1 Agonists Revealed

JAMA Network

About The Study: From 2020 to 2025, prior authorization for glucagon-like peptide-1 receptor agonists (GLP-1RAs) became near universal and out-of-pocket costs rose substantially in 2025, as plans increasingly required coinsurance. Although the rise in prior authorization may reflect efforts to curtail off-label GLP-1RA use, recent increases in out-of-pocket costs likely resulted from broader shifts to coinsurance affecting many high-cost drugs.

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