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The Big Three PBMs’ 2026 Formulary Exclusions: MFP, Private Label Biosimilars, and Direct-to-Patient Threats for PBMs

Summary by RetailWit
For 2026, the three largest pharmacy benefit managers (PBMs)—Caremark (CVS Health), Express Scripts (Cigna), and Optum Rx (United Health Group)—have once again excluded hundreds of drugs from their standard formularies. Our updated counts appear below. The 2026 lists highlight how formulary preferences for Humira and Stelara are dominated by private-label biosimilars affiliated with the same parent companies that operate the three largest PBMs. …
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RetailWit broke the news in on Thursday, January 22, 2026.
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