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💊 '''Pharmacy benefit manager (PBM)''' is a third-party entity that administers prescription drug programs on behalf of [[Definition:Health insurance | health insurers]], [[Definition:Self-insured plan | self-insured employers]], and government health plans, serving as the intermediary between [[Definition:Insurance carrier | carriers]], pharmacies, and drug manufacturers. Within the insurance ecosystem, PBMs negotiate drug pricing, manage [[Definition:Formulary | formularies]], process [[Definition:Claim | claims]] at the pharmacy counter, and design benefit structures that determine what [[Definition:Policyholder | members]] pay out of pocket. The three largest PBMs — CVS Caremark, Express Scripts, and OptumRx — collectively manage pharmacy benefits for the vast majority of commercially insured Americans, making them pivotal players in [[Definition:Health insurance | health insurance]] cost management.

⚙️ A PBM's operations revolve around several interconnected functions. It negotiates [[Definition:Rebate | rebates]] with pharmaceutical manufacturers in exchange for favorable [[Definition:Formulary | formulary]] placement, establishes networks of retail and mail-order pharmacies, and adjudicates [[Definition:Claim | claims]] in real time when a patient fills a prescription. For the insurer, the PBM provides [[Definition:Utilization management | utilization management]] tools such as prior authorization, step therapy, and quantity limits that steer prescribing toward cost-effective alternatives. Revenue for the PBM comes from administrative fees, retained rebate spreads, and the differential between what it charges the health plan and what it reimburses the pharmacy — a [[Definition:Spread pricing | spread pricing]] model that has drawn significant regulatory scrutiny.

🔎 The role of PBMs in insurance has become one of the most debated topics in [[Definition:Health insurance | health care]] cost containment. Critics argue that opaque rebate flows and [[Definition:Spread pricing | spread pricing]] inflate overall drug spending, while proponents contend that PBM purchasing leverage delivers meaningful savings that would be impossible for individual insurers to achieve alone. State legislatures and federal regulators have responded with a wave of transparency requirements, [[Definition:Fiduciary | fiduciary]] standards, and proposals to limit PBM consolidation. For health insurers designing competitive [[Definition:Group health plan | group]] and [[Definition:Individual health insurance | individual]] products, choosing and managing a PBM relationship directly affects [[Definition:Medical loss ratio (MLR) | medical loss ratios]], member satisfaction, and the ability to meet [[Definition:Affordable Care Act (ACA) | ACA]] benchmarks — making PBM strategy a core competency rather than a back-office afterthought.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Health insurance]]
* [[Definition:Formulary]]
* [[Definition:Utilization management]]
* [[Definition:Medical loss ratio (MLR)]]
* [[Definition:Self-insured plan]]
* [[Definition:Third-party administrator (TPA)]]
{{Div col end}}

Definition:Pharmacy benefit manager (PBM) - Revision history

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