Every fall, headlines announce the average Medicare Advantage or Part D premium for the coming year, usually sometime in September. It’s easy to assume that means you can go online that same week and see exactly what your own 2027 plan options will cost. You can’t. The number that makes headlines in September is a national average calculated from data insurers submit to the government. The tool where you actually type in your ZIP code and your prescription list to see your real 2027 choices doesn’t refresh with that information until October.
Two Different Things Both Get Called “2027 Medicare Numbers”
The confusion comes from the fact that Medicare’s pricing calendar runs on two separate tracks that both produce numbers labeled “2027.” One track is a technical, industry-facing process: insurers submit bids to CMS, CMS uses those bids to calculate national averages, and CMS shares that data with plan sponsors and the public in aggregate form. The other track is the retail experience most households actually use, a searchable tool where you plug in your own location and medications and get plan-specific costs. The first track moves faster than the second, and that gap is what this year’s timeline is really about. That two-track calendar isn’t new for 2027; it’s the same rhythm CMS follows every year, starting with a January proposal, moving through a spring rate announcement, and ending with a September technical release well before anyone can shop by ZIP code.
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What CMS Already Released This Summer
On July 28, 2026, CMS released what it calls preliminary technical Part D bid information for 2027, including the national average monthly bid amount and the national base beneficiary premium, the starting figures used to calculate individual plan premiums nationwide. According to the CMS fact sheet announcing that release, this information exists “to help Part D plan sponsors finalize their Part D and Medicare Advantage offerings and prepare for Medicare Open Enrollment,” not to tell an individual enrollee what their own plan will cost. The underlying CMS memo confirms this data was addressed to “All Medicare Advantage Organizations and Medicare Prescription Drug Plan Sponsors,” the insurance companies, not to the public. That July release was itself the product of a longer process: CMS had already opened the 2027 payment cycle back in January 2026 with a proposed Advance Notice on Medicare Advantage capitation rates, then finalized those payment policies in the spring, well before insurers even finished the bids that produced July’s national figures.
Why the Public Comparison Tool Waits Until October
That same CMS fact sheet states the agency’s own timeline plainly: “As in past years, CMS will release the 2027 MA and Part D landscape in mid-to-late September, once all offerings are finalized. In addition, CMS will release final average MA and Part D premiums, along with other key information, in September with the MA and Part D landscape.” The landscape files are aggregate, national-level data used by researchers, insurers, and the media, not a beneficiary-facing shopping tool. Medicare’s actual public comparison tool, where a person enters their ZIP code and drug list to see real out-of-pocket estimates for the specific plans available where they live, follows on a slower, separate track that has historically opened with next year’s data in October, just ahead of the October 15 start of Open Enrollment.
What You Can and Can’t Do Right Now
Right now, in September, you can reasonably expect to see national reporting on average premium trends and hear whether costs are broadly rising or falling. What you can’t yet do is log into Medicare’s comparison tool and get a real number for your own plan, your own pharmacy, and your own drug list, because that plan-specific data for 2027 hasn’t been loaded into the public tool yet. Anyone contacted this month by an agent or a piece of mail claiming to already have your exact 2027 plan price should treat that claim skeptically until the real comparison tool is live and showing current-year figures for named 2027 plans. A licensed agent may legitimately know which plans they expect to offer, but no one outside CMS and the plans themselves has your finalized, ZIP-code-specific 2027 premium and drug-cost numbers before the public tool refreshes.
Why Shopping Early Still Beats Waiting
None of this means there’s nothing to do before October. This is the window to gather your current drug list, refill dates, and any changes to your health needs so you’re ready to run a real comparison the moment the tool updates. Open Enrollment runs October 15 through December 7, and the plans you compare then will be the same plans whose national averages CMS is already finalizing behind the scenes this month. The gap between the September numbers and the October tool isn’t a delay you need to fight; it’s simply how CMS’s own release calendar, confirmed in its own July fact sheet, has worked in past years and is working again this year.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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