First, What Is Original Medicare?

Original Medicare includes:

  1. Part A – Hospital coverage
  2. Part B – Medical coverage

With Original Medicare:

  1. You may generally see any provider nationwide who accepts Medicare.
  2. You are responsible for deductibles.
  3. After meeting deductibles, Medicare typically pays about 80% of approved services.
  4. There is no annual out-of-pocket maximum.

Because there is no cap on the 20% coinsurance, many individuals explore additional coverage options.

Two common paths are Medicare Supplement or Medicare Advantage.


What Is a Medicare Supplement (Medigap) Plan?

A Medicare Supplement plan works alongside Original Medicare.

How It Works:

  1. Medicare pays its portion first.
  2. The Supplement plan helps cover some or most of the remaining out-of-pocket costs, depending on the plan selected.

Key Features:

  1. Standardized by the federal government (Plans A–N in most states).
  2. Generally allows access to providers nationwide who accept Medicare.
  3. Referrals are typically not required.
  4. Requires a monthly premium in addition to your Part B premium.
  5. Does not usually include prescription drug coverage — a separate Part D plan is required.

Medicare Supplement plans do not replace Medicare — they coordinate benefits with Original Medicare.

Eligibility, premiums, and availability vary by state and carrier.


What Is a Medicare Advantage Plan?

A Medicare Advantage plan (Part C) is an alternative way to receive your Medicare benefits.

These plans are offered by private insurance companies approved by Medicare.

How It Works:

  1. The plan becomes your primary coverage instead of Original Medicare.
  2. You must continue paying your Part B premium.
  3. Many plans include prescription drug coverage.
  4. Most plans use provider networks (HMO or PPO).
  5. Plans include an annual maximum out-of-pocket limit for covered services.

Costs may include copays, coinsurance, and possibly a monthly plan premium.

Benefits, provider networks, and costs vary by location and carrier.


Comparing Medicare Supplement and Medicare Advantage


Here are some of the primary differences:


1. Provider Access


Medicare Supplement

  1. Works with Original Medicare.
  2. Generally allows access to any provider nationwide who accepts Medicare.
  3. Typically no referrals required.

Medicare Advantage

  1. Usually operates within a provider network.
  2. Referrals may be required depending on plan type.
  3. Out-of-network services may cost more or may not be covered except in emergencies.


2. Cost Structure


Medicare Supplement

  1. Typically higher monthly premium.
  2. Lower out-of-pocket costs when medical services are used.
  3. Helps reduce exposure to the 20% coinsurance under Original Medicare.

Medicare Advantage

  1. May have lower monthly premiums.
  2. Costs are often pay-as-you-use (copays and coinsurance).
  3. Includes an annual out-of-pocket maximum.

Actual costs vary by plan and location.


3. Prescription Drug Coverage


Medicare Supplement

  1. Requires enrollment in a separate Part D prescription drug plan.

Medicare Advantage

  1. Many plans include prescription drug coverage built in.


4. Enrollment Considerations

Medicare Supplement

  1. Typically best purchased during your Medigap Open Enrollment Period when guaranteed issue rights apply.
  2. May require underwriting outside of certain enrollment periods.

Medicare Advantage

  1. Enrollment periods apply, including Initial Enrollment Period and Annual Enrollment Period.
  2. Plan details may change annually.


Which Option May Be Right for You?


There is no one-size-fits-all answer.

When comparing options, consider:

  1. Do you prefer predictable monthly costs or pay-as-you-go costs?
  2. Do you travel frequently or live in multiple states?
  3. Are your preferred doctors in-network?
  4. How often do you expect to use healthcare services?
  5. What fits your long-term financial plan?

Each individual’s needs and preferences are different.


Final Thoughts


Both Medicare Supplement and Medicare Advantage plans are approved ways to receive Medicare benefits.

They differ in structure, provider access, cost design, and coverage coordination.

Before making a decision, consider reviewing your personal situation with a licensed insurance professional who can explain the plans available in your area.

This article is intended for educational purposes only and does not represent a specific plan or carrier.