Short Answer for Comparing Medicare Advantage vs Medicare Supplement: Medicare Advantage (Part C) is a part of Medicare that combines Original Medicare Part A, Part B and usually Part D into a single managed plan with additional benefits from a private insurer — often with a $0 monthly premium and variable out-of-pocket copays and coinsurance.
Medicare Supplement (Medigap) is a separate policy that adds to Original Medicare, covering your portion of your Part A and Part B out-of-pocket costs and letting you see any doctor who accepts Medicare nationwide, but it costs more upfront (averaging about $189/month at age 65) and requires a separate Part D drug plan. You cannot have both at the same time.
The right choice depends on your specific health and income needs. If you’d rather pay a higher upfront premium (Medigap) to have freedom from networks and predictable monthly costs, or save monthly with lower premiums and capped-but-variable copays and a network of providers (Medicare Advantage).
At-a-Glance Comparison: Medicare Advantage vs Medicare Supplement
| Medicare Advantage (Part C) | Medicare Supplement (Medigap) | |
| How it works | Combines Part A, Part B, Part D into a managed HMO or PPO plan. | Separate plan on top of Original Medicare, helps cover your Part A and Part B deductible and copays, depending on the plan. |
| Monthly premium | $0–low premium (Must continue to pay Part B as well) | Averages $189/month at age 65 for Plan G (Must continue to pay Part B as well) |
| Provider network | Provider networks (HMO/PPO) | Any doctor nationwide who accepts Medicare |
| Prescription drugs (Part D) | Usually included | Must buy separately |
| Extra benefits | Often includes dental, vision, hearing, fitness programs, Over the counter spending | None — Medigap only covers Medicare-eligible costs |
| Cost predictability | Save monthly, pay copays when seeking care (capped maximum out-of-pocket costs) | Higher monthly costs, save when you seek care depending on the plan. |
| Standardization | Varies by insurer and plan, must cover what Medicare covers but may cover more. | Standardized by letter (A–N); identical benefits regardless of insurer. Only covers what Medicare covers. |
| Enrollment periods | Annual Enrollment Period (Oct 15–Dec 7), Special Enrollment Periods | Open Enrollment window without underwriting is the 6 months after Part B starts; medical underwriting may apply later |
What Is Medicare Advantage?
Medicare Advantage, also called Part C, is offered by private insurers that are approved by Medicare. These plans are a part of Medicare! Medicare Advantage plans bundle Part A (hospital), Part B (medical), and — in most cases — Part D (prescription drugs) into a single managed plan. They must cover at least what Medicare covers, but most plans cover more than Medicare and include extra benefits like dental, vision, gym memberships, over-the-counter allowance, and Part B Giveback.
Key characteristics:
- Offered and managed by private insurance companies
- Generally, an HMO or PPO network — use a network of doctors covered by the plan.
- Includes an annual out-of-pocket maximum on costs each year, then the plan pays 100%.
- Frequently includes extra benefits like dental, vision, hearing, and gym memberships
- Most Medicare Advantage plans have a $0 or low premium after the standard Part B premium.
- No underwriting to join.
What Is Medicare Supplement (Medigap)?
Medicare Supplement, or Medigap, is a policy you buy from a private insurer to help cover your portion of Original Medicare costs. This can include deductibles, copayments, and coinsurance.
Key characteristics:
- Works alongside Original Medicare as a separate policy — you must have Part A and Part B to enroll.
- Higher monthly premiums in addition to the Part B premium. Higher coverage means higher premiums.
- Standardized lettered plans (A through N in most states); a Plan G from one insurer covers the same benefits as a Plan G from another, though premiums can differ significantly between insurers for identical coverage
- Does not include Part D drug coverage — you’ll need a separate stand-alone drug plan.
- No provider network — you can see any doctor or specialist nationwide who accepts Medicare, with no referrals
- You have 6 months from your Part B start date to enroll without underwriting.
Pros and Cons: Medicare Advantage vs Medicare Supplement
There are tradeoffs when deciding between both Medicare Advantage and Medicare Supplement. Each plan does have its Pros and Cons.
Medicare Advantage Pros and Cons
Pros:
- Often $0 or low monthly premium
- Built-in annual cap on what you’ll pay out-of-pocket
- One plan to cover all parts of Medicare — includes Parts A, B, and D
- Extra benefits like dental, vision, and hearing not available under Original Medicare
- Special plans for those with Veterans benefits or Tricare for Life.
Cons:
- Network restrictions — non-emergency care outside the network may cost more or not be covered
- May require referrals to see specialists, although many plans do not.
- Prior authorization is more common for some services than on Original Medicare
- Coverage and benefits can change from year to year
Medicare Supplement Pros and Cons
Pros:
- See any doctor nationwide who accepts Medicare, no referrals
- Most Medigap plans follow you if you move states, so no need to change.
- Standardized benefits make comparing different insurance carriers easy
- Coverage stays the same and doesn’t change year to year
Cons:
- Higher monthly premium, averaging around $189/month at 65
- Premiums increase every year.
- No prescription drug coverage — requires a separate Part D plan and its own premium
- No extra benefits like dental or vision – only covers what Medicare covers
- Applying after your initial enrollment window may involve medical underwriting
Frequently Asked Questions
Is Medicare Advantage or Medicare Supplement more affordable?
The affordability depends on your current health needs and utilization. Medicare Advantage usually has the lower monthly premium, then you pay copays and coinsurance when you seek care up to the maximum.
Medigap costs more each month in premiums, but then you generally pay less when you seek care. If you have a lot of health needs, then your total annual spending could be less annually with a Medicare Supplement if your monthly premiums total less per year than the maximum out-of-pocket of a Medicare Advantage plan. If you are healthy, then you could save with a Medicare Advantage plan without the higher premiums for coverage you don’t use.
Does Medicare Advantage or Medigap cover prescription drugs?
Most Medicare Advantage plans include Part D drug coverage. Medigap plans never include drug coverage and you must enroll in a separate stand-alone Part D plan.
What is the Medicare Advantage out-of-pocket maximum in 2026?
The maximum out-of-pocket (MOOP) spending can vary based on your plan, carrier and location. Generally, HMOs have a lower MOOP than PPO plans. Also, large metropolitan areas tend to have more options with low maximum out-of-pockets. We have seen them vary between $500 to $9,250 for in-network MOOP.
Can I have both Medicare Advantage and Medicare Supplement at the same time?
No. They’re mutually exclusive. Medicare Advantage combines Original Medicare into one managed plan, while Medigap only works alongside Original Medicare. Buying both is not permitted.
Can I switch between Medicare Advantage and Medicare Supplement?
Technically, you can at certain times if you qualify. You can switch from Medicare Advantage to a Medicare Supplement if you can pass underwriting (or have a guaranteed issue) and it is during a valid election period. If you want to switch to a Medicare Advantage plan from a Medicare Supplement, then you just need a valid enrollment period. Underwriting is not required for Medicare Advantage plans.
Hi, My name is Butterfly. I have been a licensed agent for over 10 years. I am contracted and certified to assist Medicare beneficiaries through the Medicare process. I specialized in educating the public about Medicare enrollment rules, timelines, and coverage options. My goals is to help you understand your options and help you avoid common enrollment mistakes that can lead to penalties or gaps in coverage.
