Top-rated 2026 Medicare Advantage providers include Aetna, UnitedHealthcare, Humana, Kaiser Permanente, and Devoted Health. These insurers excel based on high CMS star ratings, large provider networks, and comprehensive benefits. Choosing the best plan depends heavily on your specific location and healthcare needs.
UnitedHealthcare gets slightly higher overall star ratings than BCBS and may offer lower prices, but BCBS might offer a better customer experience.
Here are some of the biggest Medicare mistakes to avoid:
**For Plans K and L, after you meet your out-of-pocket yearly limit and your yearly Part B deductible ($283 in 2026), the Medigap plan pays 100% of covered services for the rest of the calendar year.
UHC has higher star ratings and a large network, but Humana's Part B Giveback benefits and lower average premiums might make coverage more affordable.
Plan G Coverage: Provides extensive benefits with minimal out-of-pocket costs, making it ideal for frequent healthcare users and travelers. Plan N Coverage: Lower premiums but involves copays for doctor visits and no coverage for Part B excess charges.
Some of the items and services Medicare doesn't cover include:
For comparison, the Centers for Medicare and Medicaid Services completed almost 400,000 prior authorization reviews for Original Medicare in 2023 and denied 28.8%, or 113,448 of requests received. Centene and CVS Health Medicare Advantage plans had the highest denial rates for prior authorization requests.
Cons About UnitedHealthcare Medicare Advantage
You may only have access to certain HMO or PPO plans in your area. Although UnitedHealthcare has competitive pricing, your location may have access only to plans with higher deductibles, more copays and fewer additional benefits.
UnitedHealth's stock crash from over $600 to around $310-$320 (nearly 50% down) in the past year, isn't just market noise. It's a fundamental breakdown driven by one metric: the Medical Care Ratio (MCR). And here's the kicker—even Optum, the segment that was supposed to save the day, is struggling, too.
Best Medicare Supplement Insurance Companies in 2026
Best for size of Medicare dental network: UnitedHealthcare Medicare Advantage. Best for comprehensive Medicare dental coverage: HealthSpring (formerly Cigna) Medicare Advantage. Best Medicare dental coverage with high ratings: Aetna Medicare Advantage.
If you prefer no medical bills beyond your premiums, Plan F may be the better fit—but only if you were eligible for Medicare before 2020. If you're looking for premium savings and don't mind covering a small out-of-pocket deductible, Plan G offers nearly identical coverage with lower monthly prices.
Here, we discuss the first five most common medical coding and billing mistakes that cause claim denials so you can avoid them in your business:
Key Takeaways
Original Medicare does not cover 100% of your medical costs, and it does not cover prescription drugs.
It does not cover generalized routine blood testing, only medically necessary blood tests. For example, if your doctor prescribes blood work because you exhibit symptoms of a specific condition and the blood work can help with diagnosis, this is considered medically necessary.
If you have Medicare drug coverage (Part D), your yearly out-of-pocket Part D drugs will be capped at $2,100 in 2026. Once you reach this cap, you won't have to pay a copayment or coinsurance for covered Part D drugs for the rest of the calendar year (page 83).
On average, though, beneficiaries will pay between $90 and $300 per month for mid-level plans like Medicare Plan G or Part N. Below, we'll take a closer look at the typical cost ranges for popular Medigap plans in 2025.
Medicare Advantage Plan (Part C):
Deductibles, coinsurance, and copayments vary based on which plan you join. Plans also have a yearly limit on what you pay out-of-pocket. Once you pay the plan's limit, the plan pays 100% for covered health services for the rest of the year.