Medicare Advantage

Medicare Star Ratings Explained for Temecula Shoppers

Riverside County has 88 Medicare Advantage plans for 2027. Compared with 2026, 17 plans are not coming back, 14 are new, and 52 continuing plans changed in some way you should check before December 7, 20 of them under a new name. This guide covers what those numbers mean for Temecula, not which plan to pick.

Temecula, California — As Medicare's Annual Enrollment Period runs through Dec. 7, shoppers on Medicare.gov are once again seeing little rows of stars next to Medicare Advantage and Part D plans. Those Star Ratings were refreshed by the Centers for Medicare & Medicaid Services (CMS) this fall, as they are every October, and they'll guide how plans are described throughout the 2027 plan year. But the ratings are widely misunderstood — so here's a plain-English look at what they actually measure, and what they don't.

What Star Ratings Are

Star Ratings are a quality measurement system run by CMS. Every fall, CMS publishes updated ratings on a 1-to-5 scale (5 is the highest) for Medicare Advantage plans and standalone Part D drug plans. The ratings go live on the Medicare Plan Finder at medicare.gov ahead of the Annual Enrollment Period, which runs Oct. 15 through Dec. 7.

The ratings are meant to give people a general sense of how a plan has been performing — not a personalized recommendation. A high-star plan is not automatically the right fit for any one person, and a lower-star plan is not automatically a poor fit. The stars describe the plan; they don't describe you.

What the Stars Actually Measure

For Medicare Advantage plans that include drug coverage, CMS looks at dozens of separate measures and rolls them into an overall score. Broadly, those measures fall into a few buckets:

• Staying healthy: whether members are getting recommended screenings, vaccines, and check-ups.
• Managing chronic conditions: how well the plan supports people living with things like diabetes or high blood pressure.
• Member experience: survey responses about ease of getting care and appointments.
• Member complaints and changes in the plan's performance: including how often people leave the plan.
• Customer service: how the plan handles calls, appeals, and access to needed care.

For Part D drug coverage, the measures focus on drug safety, accuracy of pricing information, customer service, and member experience at the pharmacy counter.

Notice what isn't on that list: the price of the plan, its premium, or its specific benefits. Stars are about quality and experience, not cost.

How and When Ratings Are Published

CMS releases the new Star Ratings in October each year, in time for the Annual Enrollment Period. The 2027 ratings — the ones you'll see when comparing plans this fall — are based largely on data from the 2025 measurement year, including member surveys, clinical data submitted by plans, and CMS's own monitoring.

Because the ratings lag by roughly a year, they reflect how a plan performed recently, not necessarily how it's performing this week. That's a fair trade-off — CMS needs time to audit the data — but it's worth knowing.

Temecula is in Riverside County, where a large number of Medicare Advantage and Part D options are offered, and each of those plans carries its own star rating on the Plan Finder.

What Stars Do Not Tell You

This is where a lot of readers get tripped up. Star Ratings do not tell you:

• Whether your doctors or hospitals are in the plan's network.
• Whether your specific prescriptions are on the plan's formulary, or what tier they land on.
• What your monthly premium, deductible, or copays would be.
• How the plan handles extra benefits like dental, vision, or hearing.

For 2026, some of the most important numbers for drug costs are set by law, not by Star Ratings: the Part D out-of-pocket cap is $2,100, the maximum Part D deductible is $615, and the old "donut hole" coverage gap has been replaced by a simpler three-phase design (a change that took effect in 2025). There's also the optional Medicare Prescription Payment Plan, which lets you spread drug costs across the calendar year in monthly installments.

None of those figures show up in a star.

How to Use Star Ratings When You Compare

Think of the stars as one input among several. A reasonable approach:

1. Start with your doctors, hospitals, and prescriptions. Confirm they're covered. 2. Look at the total picture of costs — premium, deductible, copays, and the Part D cap. 3. Then look at Star Ratings to get a read on the plan's service and quality history. 4. If you have higher income, check whether IRMAA surcharges apply to you. For 2026, IRMAA begins above $109,000 in income for a single filer.

If you're already enrolled in a Medicare Advantage plan, remember there's a second window each year — the Medicare Advantage Open Enrollment Period, Jan. 1 through March 31 — when you can make one change if the plan you picked isn't working.