Aetna
4.27
CMS Star Rating
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Aetna vs. Kaiser Permanente: Medicare Advantage Comparison
Aetna offers Medicare Advantage plans in most states, while Kaiser Permanente's reach is much smaller.
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Written by Kate Ashford, CSA®
Lead Writer
Aetna's star ratings improved in 2025 — a year when the average rating for all plans dropped — and the company scored above average for member experience.
Kaiser Permanente’s Medicare Advantage plans are available in eight states and Washington, D.C., and Kaiser uses an integrated care model, so all providers are connected.
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Kaiser Permanente
4.41
CMS Star Rating
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Here’s a look at how Aetna and Kaiser Permanente Medicare Advantage compare.
Why trust NerdWallet
Aetna Medicare Advantage
Aetna Medicare Advantage plans are widely available and highly rated, for both star ratings and member experience scores.
Pros
Nearly 8 in 10 Aetna plans are rated 4 stars or higher.
Available in 44 states and Washington, D.C.
Some plans offer MinuteClinic access for low copays.
Cons
Customer satisfaction lands below the regional average in some major Medicare markets.
Reduced benefits and plans are no longer available in two states.
Other factors to consider
Provider size | 4th-largest provider of Medicare Advantage plans. |
Medicare Advantage enrollment | More than 4.4 million. |
Percent of plans rated 4 stars or higher | 78%. |
Percent of plans with $0 premium | 59%. |
Plans available | HMO, HMO-POS, PPO, SNP. |
Aetna Medicare Advantage plan availability
Aetna
4.27
CMS Star Rating
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Kaiser Permanente Medicare Advantage
Kaiser Permanente Medicare Advantage plans get above-average star ratings, but the company sells plans in only eight states and Washington, D.C.
Pros
Earns top customer satisfaction scores in California, one of the major Medicare markets studied by J.D. Power.
100% of members are in a highly-rated plan.
Most plans include drug coverage.
Cons
Available in only eight states and Washington, D.C.
Offers mostly HMO plans, so most members must work within Kaiser’s network of medical providers.
Member experience ratings overall are below average.
Other factors to consider
Provider size | 5th-largest provider of Medicare Advantage plans. |
Medicare Advantage enrollment | 1.9 million. |
Percent of plans rated 4 stars or higher | 100%. |
Percent of plans with $0 premium | 47%. |
Plans available | HMO, HMO-POS, PPO, SNP. |
Kaiser Medicare Advantage plan availability
Kaiser Permanente
4.41
CMS Star Rating
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Find the right Medicare Advantage plan
It’s important to do your research before selecting a Medicare Advantage plan for yourself. Here are some questions to consider asking:
What are the plan’s costs? Do you understand what the plan’s premium, deductibles, copays and/or coinsurance will be? Can you afford them?
Is your doctor in-network? If you have a preferred medical provider or providers, make sure they participate in the plan’s network.
Are your prescriptions covered? If you’re on medication, it’s crucial to understand how the plan covers it. What tier are your prescription drugs on, and are there any coverage rules that apply to them?
Is there dental coverage? Does the plan offer routine coverage for vision, dental and hearing needs?
Are there extras? Does the plan offer any extra benefits, such as fitness memberships, transportation benefits or meal delivery?
» MORE: Best Medicare Advantage plans
If you have additional questions about Medicare, visit Medicare.gov or call 800-MEDICARE (800-633-4227, TTY 877-486-2048).
Medicare Advantage review methodology
The Medicare Advantage marketplace is concentrated among just a handful of companies; in many places, one insurer serves more than half of the market. NerdWallet reviewed 26 Medicare Advantage brands, with some insurers having more than one brand under their umbrella. (For example, Blue Cross Blue Shield includes the brands Anthem and Highmark.) At the national level, these reviews include nine of the 10 largest brands by enrollment. At the state level, our research includes at least one major insurer in 47 of the 49 states that offer Medicare Advantage plans, and includes the top two insurers in 35 of those states. (Alaska doesn't offer Medicare Advantage plans.) We also look at online search volume to identify regional and other notable players in the space.
NerdWallet’s Medicare Advantage reviews are based on ratings data from the Centers for Medicare & Medicaid Services, as well as pricing, plan availability by state, plan types available, consumer experience, extra benefits offered and more. These reviews are a guide, but we encourage you to shop around and compare several plans to find the best coverage and rate for you. NerdWallet does not receive compensation for any reviews. Read our editorial guidelines for additional information.
