Medicare Advantage

Medicare Star Ratings in Mission Viejo, CA 2027

People in Mission Viejo can choose from 111 Medicare Advantage plans for 2027, against 104 this year. 21 of this year’s plans are gone, 28 are new to Orange County, and 51 that continue have changed their premium, deductible, plan type or name, 19 of them under a new name.

MISSION VIEJO, Calif. — Every fall, just before Medicare's Annual Enrollment Period opens on October 15, the federal government refreshes a scorecard that quietly shapes how millions of people compare their coverage: the Medicare Star Ratings. The 2027 ratings are now posted on Medicare Plan Finder at medicare.gov, and if you live in Mission Viejo — or anywhere else — the stars you see next to a plan this fall reflect a year's worth of measured performance, not marketing.

Here is what those one-to-five stars actually measure, what changed for the 2027 cycle, and how to use the ratings without letting them make the decision for you.

What the stars actually measure

Star Ratings are produced by the Centers for Medicare & Medicaid Services (CMS) for Medicare Advantage plans and standalone Part D drug plans. Each plan gets an overall rating from one star (poor) to five stars (excellent), plus separate summary ratings for health services and drug services.

Behind that single number is a large set of quality measures pulled from clinical data, pharmacy records, member surveys, and CMS's own monitoring. The categories generally cover:

• Staying healthy: screenings, vaccines, and preventive checkups.
• Managing chronic conditions: how well plans help members control diabetes, blood pressure, and similar issues.
• Member experience: survey answers about getting care and customer service.
• Member complaints and plan performance: how often members leave, file complaints, or appeal decisions.
• Customer service: call center performance, appeals handling, and language access.
• Drug plan quality: pricing accuracy, medication safety, and adherence for common conditions.

Medicare Advantage plans that include drug coverage (MA-PD) are rated on up to roughly 40 measures. Standalone Part D plans are rated on about a dozen.

Why the fall timing matters

CMS releases the new Star Ratings in October so they are visible during the Annual Enrollment Period, October 15 through December 7. That is the window when most people can switch Medicare Advantage plans or Part D drug plans for the following year.

There is also a second window — the Medicare Advantage Open Enrollment Period, January 1 through March 31 — when someone already in a Medicare Advantage plan can make one change.

The ratings you see on Plan Finder this fall are the 2027 ratings, based on data collected in prior measurement years. Ratings can move up or down from year to year as plan performance changes.

What Star Ratings are not

This is where we have to be careful. Star Ratings are a quality snapshot — they are not a recommendation, and MyMedicarePlans.org will not use them to steer you toward any particular plan.

A five-star plan is not automatically the right plan for you if it does not cover your prescriptions, your primary care doctor, or the specialists you already see. A three-star plan is not automatically a bad fit either. The stars measure the plan's performance overall; your experience depends on your health, your medications, and your providers.

How Mission Viejo residents can use the ratings

Mission Viejo is in Orange County, where Medicare beneficiaries typically have a wide range of Medicare Advantage and Part D options during Annual Enrollment. When you compare plans on medicare.gov, the Star Rating appears next to each plan name. You can:

1. Enter your ZIP code and your list of prescriptions on Plan Finder. 2. Look at the star rating alongside the plan's drug coverage, provider network, and total estimated yearly cost. 3. Weigh the rating as one factor — not the only factor.

Remember, Medicare plan availability is set at the county level, so two neighbors in Mission Viejo generally see the same menu of plans, but their best-fit choice can be very different.

A few 2027 program facts worth knowing

While you are looking at ratings, keep the broader program numbers in mind:

• The Part D out-of-pocket cap is $2,100 for 2026.
• The Part D maximum deductible is $615 in 2026 ($700 in 2027).
• The old coverage gap ("donut hole") was eliminated in 2025; Part D now has three phases.
• The Medicare Prescription Payment Plan lets you spread drug costs into monthly installments at no added cost.
• Income-related Part B and Part D surcharges (IRMAA) start above $109,000 in income for a single filer in 2026.

These rules apply program-wide, regardless of which plan you choose.

Where to get unbiased help

For personalized answers, use official sources:

• Medicare.gov — Plan Finder, Star Ratings, and coverage rules.
• 1-800-MEDICARE (1-800-633-4227), 24/7.
• California's SHIP program, known as HICAP, offers free one-on-one counseling for Mission Viejo residents through the Orange County office.