You walk into the pharmacy expecting the same prescription and roughly the same bill you paid last time, only to discover the price has jumped. The pharmacist confirms that your Medicare Part D plan still covers the drug, which makes the higher charge even more confusing. The problem is that “covered” does not mean a prescription must cost exactly the same every time you fill it. Deductibles, drug tiers, coinsurance, pharmacy networks, manufacturer price changes, and formulary adjustments can all influence what eventually appears on the receipt. Understanding why Medicare Part D prescription costs change can help you determine whether the new price is correct and what you may be able to do about it. Let’s break down what you need to know.
