Medicare Part D worked just as intended to make drugs more affordable to seniors—but only for a very few years. The medical industry soon developed strategies to benefit financially from the policy, undermining its patient-centered ambitions. Basic drugs for common conditions in the elderly, such as high blood pressure and rheumatoid arthritis, had to be cheap in the decades before Medicare Part D picked up the tab. But once all seniors were guaranteed drug coverage and were paying only a co-payment, drug companies raised prices—a lot. Insurers then responded by charging higher-percentage
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