A Medicare plan can look excellent on paper, then become frustrating the first time you need a specialist, a costly prescription, or help resolving a claim. That is why Medicare carrier ratings deserve attention. But a rating is not a verdict on whether a plan is right for you. It is one useful signal in a decision that should also account for your doctors, medications, travel habits, budget, and preferred level of flexibility.

For business owners and self-employed professionals approaching retirement, Medicare can feel like a welcome reward after years of carrying the full cost of private health coverage. The goal is not to find the carrier with the flashiest score. It is to choose coverage that works well when you actually need it.

What Medicare carrier ratings measure

The rating most people encounter is the Centers for Medicare & Medicaid Services, or CMS, Star Rating. Medicare Advantage plans and standalone Part D prescription drug plans receive ratings from one to five stars. Five stars is the highest rating.

CMS evaluates plans using a wide range of measures. Depending on the type of plan, these can include member satisfaction, customer service, preventive care, management of chronic conditions, prescription drug safety, complaint levels, and how effectively the plan handles appeals and coverage decisions.

A strong Star Rating can indicate that a plan performs consistently well for its members. It may have clearer member communication, better care-coordination programs, or a stronger record of helping people get preventive services. Those are meaningful advantages, particularly for someone managing diabetes, heart disease, or several ongoing prescriptions.

Still, the rating reflects the plan as a whole. It does not tell you whether your preferred cardiologist is in network, whether your specific medication is placed on a high-cost tier, or whether the nearest in-network hospital is convenient for you. Those questions can matter more than the difference between a four-star and a five-star plan.

Ratings are usually plan-specific, not carrier-wide

This point is easy to miss. A carrier may offer multiple Medicare Advantage or Part D plans in the same county, and they may not perform or operate identically. Networks, drug formularies, copays, and benefits can vary by plan.

Availability also changes by ZIP code. A plan that earns positive results in one part of California may not have the same network or benefit design in another county. When comparing options in San Diego, for example, it is wise to confirm access to the specific Sharp, Scripps, UC San Diego Health, or other providers you want to use. A carrier name alone is never enough.

Why a high star rating is not the whole answer

A five-star rating is encouraging, but it should start a conversation rather than end one. Medicare coverage is personal, and the best fit depends on how you use care.

Consider a retiree who sees several physicians and wants the broadest possible freedom to choose specialists. A highly rated HMO may still be a poor match if its network requires changing doctors or obtaining referrals for routine specialty care. Another person may find that same HMO ideal because their physicians participate, they are comfortable coordinating care through a primary doctor, and the lower out-of-pocket costs are attractive.

The same principle applies to prescription coverage. A top-rated Part D plan can be expensive for someone whose medications fall into unfavorable tiers, require prior authorization, or are not included on the formulary. Conversely, a plan with a slightly lower rating may cover that person’s prescriptions more favorably and cost far less over a full year.

Ratings are also backward-looking. They are based on prior performance and reported measures, while provider contracts, drug lists, benefits, and premiums can change annually. Before enrolling, review the current plan year materials rather than relying on a rating shown in an old advertisement or a recommendation from a neighbor.

Medicare Advantage ratings versus Medicare Supplement decisions

Medicare carrier ratings are most visible in Medicare Advantage and Part D shopping because CMS publishes Star Ratings for those plans. Medicare Supplement insurance, often called Medigap, is different.

Medigap policies work alongside Original Medicare and are standardized by letter in most states. A Plan G generally provides the same core standardized benefits regardless of carrier. What can differ is premium, rate history, household discounts, underwriting rules outside protected enrollment periods, customer service, and the carrier’s financial stability.

That means a CMS Star Rating should not be used to judge a Medicare Supplement carrier. Instead, look at practical evidence: how long the insurer has operated in the market, its financial-strength assessments, its complaint history, how it has handled rate changes over time, and the quality of service you can expect when you have a question.

Financial-strength ratings from agencies such as AM Best are designed to assess an insurer’s ability to meet its financial obligations. They are useful, but they are not a promise that premiums will remain flat or that a policy will be the best long-term value. A financially strong carrier can still have future rate increases. The key is to view financial strength as one part of a broader suitability review.

How to read ratings without getting misled

The most reliable approach is to put each rating in context. Start with the rating, then test the plan against your real-life priorities.

For Medicare Advantage, confirm that your primary doctor, specialists, and preferred hospitals are in the network for the plan you are considering. Ask whether you need referrals, how out-of-network care is handled, and what the annual maximum out-of-pocket limit is. A low monthly premium does not erase the importance of those details.

For Part D coverage, create an accurate medication list that includes dosage and frequency. Check every prescription against the current formulary, not just the medications you take most often. Look for deductibles, tiers, quantity limits, prior authorization rules, preferred pharmacies, and mail-order pricing. A plan’s total yearly cost can be very different from its monthly premium.

For Medicare Supplement coverage, compare standardized benefits alongside long-term value. It may be tempting to choose the lowest premium immediately, especially after years of paying substantial individual-market premiums. But a carrier’s rate approach and service record can matter over time. The cheapest option today is not automatically the most economical option several years from now.

A useful comparison should also address lifestyle. If you spend extended time in Arizona, Texas, Florida, or another state, your travel and residence pattern may affect whether a local Medicare Advantage network or Original Medicare paired with a supplement better fits your needs. Emergency coverage is not the same as routine access to care while away from home.

Complaints and service records deserve a closer look

Star Ratings include complaint-related measures, but they should not replace a closer review of service quality. State insurance departments and the National Association of Insurance Commissioners publish complaint information that can provide additional perspective. A complaint index compares a company’s share of complaints with its share of the market.

Numbers should be interpreted carefully. A small carrier can appear to have a volatile complaint record because a small number of cases changes the percentage quickly. A large carrier may have more complaints in raw numbers simply because it serves more members. Look for patterns over time, especially repeated concerns involving billing, claims, enrollment, or access to customer support.

It is also reasonable to ask a local advisor what clients experience after enrollment. The enrollment process gets attention during Annual Enrollment Period, but a plan is really tested when a member needs an authorization, receives an unexpected bill, or has a prescription issue at the pharmacy.

A better way to use ratings in your decision

Think of ratings as a screening tool. A plan with persistently poor performance deserves careful scrutiny. A plan with strong ratings earns a closer look. Neither result replaces a personal comparison.

At Kirkland Insurance, the most useful Medicare conversations begin with the person, not the carrier logo. A thoughtful review considers your providers, prescriptions, anticipated care, comfort with managed-care rules, monthly budget, and financial goals in retirement. That process is especially valuable for former business owners who are used to evaluating long-term costs rather than reacting to a single advertised premium.

The right plan should leave you with confidence, not a stack of unanswered questions. Bring your medication list, provider preferences, and concerns to the conversation, then let the ratings serve their proper role: helpful evidence, not the final decision.