Medicare Part D Changes Coming Jan. 1: What You Need to Know

In August, the Centers for Medicare & Medicaid Services (CMS) announced that the premium‑stabilization demonstration created by the Inflation Reduction Act will cease on Jan. 1. That little‑known program had been giving private stand‑alone Medicare Part D prescription‑drug plans a modest infusion of federal money to keep premiums from jumping too fast.

What does that mean for you? If you have a stand‑alone Part D plan—like Jennifer from Little Rock, Arkansas, who writes to us—your monthly cost is likely to rise. CMS estimates the average increase will be roughly $10 per month, though the exact amount will vary by plan and location.

The good news is that the change only affects stand‑alone Part D plans. Medicare Advantage (MA) plans, such as the HMO her sister carries, are not part of the discount program, so their premiums won’t be impacted by this particular move.

Here’s a quick checklist to keep you on track for the 2027 coverage year:

• Watch the mail. Around late September you should receive the annual notice of change for your current Part D or MA plan. It spells out the new premium, deductible, and the formulary—the list of drugs covered—for 2027.
• Don’t just auto‑renew. Even if the numbers look familiar, it’s worth a glance to see whether another plan offers a better price or a more suitable drug list for your needs.
• Mark the open enrollment window. From Oct. 15 through Dec. 7 you can switch to a different stand‑alone Part D plan or enroll in a new Medicare Advantage plan. This is the only time you can make those changes for the upcoming year.
• Plan ahead. The new Medicare & You handbook, which contains all the 2027 plan details, will arrive in the mail in late September. If you’re impatient, you can also download it from Medicare.gov when it goes live on Oct. 1.

Jennifer’s situation is a common one: she has a supplemental Plan G and a separate Part D plan, while her sister relies on an MA HMO. For Jennifer, the key step is to compare the 2027 stand‑alone Part D options once they’re released (officially on Oct. 1) and see whether her current plan still makes sense financially and clinically.

If you’re in a similar spot, take a few minutes in September to open that mailed notice, jot down the new premium, and then use Medicare’s online tool during the October‑December window to line up the best fit. A little extra effort now can spare you an unexpected price hike later.

Remember: the premium‑discount program is ending, but you still have plenty of time to shop around and protect your prescription budget.