This is what I found (Inflation Reduction legislation):
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Starting in 2025, Medicare Part D will introduce significant changes to benefit enrollees. Here’s what you need to know:

Out-of-Pocket Cap: Beginning in 2025, Part D enrollees’ out-of-pocket drug costs will be capped at $2,000. This means that once you reach this limit, you won’t have to pay any more out-of-pocket expenses for your prescription drugs during that year.
Indexing: The $2,000 cap will be indexed to rise each year after 2025 based on the growth rate in per capita drug spending3. For example, if Medicare spends 5% more in a given year, the cap for the following year would be 5% higher (e.g., $2,100).
Payment Flexibility: Additionally, you’ll have the option to spread out your out-of-pocket costs over the plan year by paying them in monthly amounts, rather than all at once when they occur2.
These changes aim to provide relief to Medicare beneficiaries and make prescription drug costs more manageable. Remember to stay informed about any updates and consult with your healthcare provider for personalized guidance.