Medicare is the federal health insurance program for people aged 65 and older as well as younger people with disabilities. Original Medicare consists of Part A, which covers hospital services, and Part B, which covers doctor visits and outpatient care. However, Original Medicare only pays for about 80% of covered medical expenses. To help fill coverage gaps, many beneficiaries get supplemental insurance either through a Medicare Advantage Plan (Part C) or a Medigap Plan like Plan G.

This article will explain the key differences between Medicare Advantage and Medigap Plan G. Understanding how these two options work can help you decide which type of supplemental coverage may be a better fit for your healthcare and financial needs.

Medicare Advantage Plan

Medicare Advantage, also known as Part C, refers to private insurance type of plans that contract with Medicare to provide beneficiaries with all Part A and Part B coverage. Medicare Advantage Plans are an alternate way to get your Medicare benefits compared to Original Medicare. Here are some important facts about Medicare Advantage Plans:

  • Offered by private insurance companies approved by Medicare
  • Includes all coverage under Part A and Part B
  • Often includes prescription drug coverage under Part D
  • Typically has lower out-of-pocket costs than Original Medicare
  • Most plans require you to use doctors and facilities in the plan’s network
  • Many plans require referrals to see specialists
  • Extra benefits like vision, hearing, dental are often included
  • Monthly premiums vary by plan
  • Out-of-pocket maximum limits annual costs

Medicare Advantage Plans include HMOs, PPOs, and private fee-for-service plans. They are available to anyone enrolled in Medicare Part A and Part B. These plans may combine Part A, Part B, and often Part D into one plan.

Plan G

Medigap Plan G is a supplemental insurance policy sold by private insurance companies. It helps pay some of the out-of-pocket costs not covered by Original Medicare like coinsurance and deductibles. Here are key details about Plan G:

  • Standardized by Medicare but sold by private insurers
  • Works alongside your Original Medicare coverage
  • Helps pay Medicare coinsurance and copayments
  • Covers Medicare Part A deductible
  • Covers Medicare Part B deductible
  • Provides emergency foreign travel medical coverage
  • Doesn’t cover most prescription drugs
  • No networks – use any provider accepting Medicare
  • Premiums vary by insurance company
  • Medigap coverage policies are guaranteed renewable

Plan G covers several gaps in Original Medicare such as coinsurance, copayments, and deductibles. It allows you flexibility in choosing healthcare providers nationwide who accept Medicare.

Differences between Medicare Advantage and Plan G

While both Medicare Advantage and Medigap Plan G provide extra coverage beyond Original Medicare, there are some significant differences:

  • Insurance Type– Medicare Advantage is provided by private insurers while Medigap is sold by private insurers approved by Medicare
  • Coverage– Advantage Plans replace Original Medicare while Medigap works along with Original Medicare
  • Providers– Advantage Plans have network restrictions while Medigap allows you to use any provider accepting Medicare
  • Referrals– Some Advantage Plans require referrals for specialists while Medigap does not require referrals
  • Prescription Drugs– Many Advantage Plans include Part D while Medigap does not cover prescriptions
  • Costs– Advantage Plans have copays and coinsurance while Medigap covers coinsurance 100%
  • Premiums– Advantage premiums vary while Medigap premiums don’t vary between companies
  • Out-of-Pocket Limits– Advantage Plans limit your annual costs while Medigap does not have a spending cap
  • Travel Coverage– Medigap covers emergencies abroad while Advantage typically does not

Overall Medicare Advantage offers more benefits upfront but limits networks and choices. Medigap gives you flexibility but at a higher premium cost.

Cost Comparison

One of the biggest differences between Medicare Advantage and Medigap Plan G is the cost structure:

  • Premiums – Medicare Advantage premiums tend to be lower or even $0, while Medigap premiums are generally higher, around $150 or more per month.
  • Deductibles – With Medigap Plan G there is $0 deductible. With Medicare Advantage, deductibles vary by plan from $0 to $999.
  • Coinsurance – Medigap Plan G covers 100% of coinsurance. When you join a Medicare Advantage Plan may have some coinsurance until you reach the plan’s out-of-pocket limit.
  • Copays – There are generally no copays with Medigap. Many Medicare Advantage Plans typically charge Medicare beneficiaries copays for services like doctor visits and prescriptions.
  • Out-of-pocket limits – Medicare Advantage Plans have a yearly limit on your costs, often around $5,000-$6,000. Medigap does not have an out-of-pocket maximum.

Medigap Plan G has higher premiums but lower overall out-of-pocket costs, while Medicare Advantage has lower premiums but expenses can add up if you need a lot of healthcare services.

Pros and Cons of Medicare Advantage and Plan G

There are advantages and disadvantages to both Medicare Advantage and Medigap Plan G:

Medicare Advantage Pros

  • Lower premiums
  • Out-of-pocket spending limits
  • Extra benefits like dental and vision
  • Coordinated care through provider network

Medicare Advantage Cons

  • Provider network restrictions for Medicare enrollees
  • Pre-approvals required for procedures
  • Premiums and benefits can change yearly
  • Costs for out-of-network care

Medigap Plan G Pros

  • Freedom to choose any Medicare provider
  • Low out-of-pocket costs
  • No claim forms to file
  • Standardized benefits don’t change

Medigap Plan G Cons

  • Higher premium costs
  • No coverage for prescription medications
  • No coordination of care between providers
  • No annual out-of-pocket spending limits

There are good reasons to consider either Medicare Advantage or Medicare Supplement insurance Plan G. It depends on your budget, health needs, and preferences around providers, networks and benefits.

Who Should Choose Medicare Advantage?

Medicare Advantage Plans make the most sense for healthy individuals who:

  • Want lower premiums and out-of-pocket costs
  • Are happy using a plan’s network of providers
  • Qualify for special needs plans due to chronic illness
  • Have limited healthcare needs and utilization
  • Are satisfied with extra benefits offered
  • Don’t need frequent specialists or procedures
  • Prefer coordinating care through a primary doctor

Who Should Choose Plan G?

Medigap Plan G is a better option for those who:

  • Have complex medical needs and utilization
  • Want to see any doctor or hospital accepting Medicare
  • Travel frequently within the U.S. and abroad
  • Have the ability to pay higher premiums
  • Use healthcare services more heavily
  • Take expensive prescription medications
  • Want stability with standardized benefits


In summary, Medicare Advantage Plans and Medigap policies like Plan G both provide ways to get more coverage beyond Original Medicare. There are trade-offs in terms of costs, provider choice, networks, benefits, and convenience. By learning the key differences between Medicare Advantage and Plan G, you can determine which approach may be a better fit based on your healthcare priorities and budget as you look for ways to supplement your Original Medicare coverage.

We’re Here to Help

You do not have to spend hours reading articles on the internet to get answers to your Medicare questions. Give the licensed insurance agents at American Entitlements a Call at (469) 814-0289. You will get the answers you seek in a matter of minutes, with no pressure and no sales pitch. We are truly here to help.


What is a Medigap Plan G?

Plan G is one of the most popular Medigap Plans. It covers all Medicare Part A and B coinsurance and copays except the Part B deductible.

What services does Medicare Part B cover?

Part B covers medically necessary services from doctors, outpatient care, durable medical equipment and some preventive services. It requires a monthly premium.

What is a Medicare Supplement Plan?

A Medicare Supplement Plan, also called Medigap, helps pay some costs that Traditional Medicare doesn’t cover like copays, coinsurance, and deductibles. It’s purchased separately from Parts A and B.

When should I enroll in Medicare prescription drug coverage?

If you don’t get drug coverage through an employer plan, it’s best to enroll during your initial enrollment period for Medicare Part D prescription drug coverage.

What’s the difference between Medicare Advantage and Medigap?

Medicare Advantage Plans (Part C) provide options like HMOs from private insurers. Medigap supplements costs left by Original Medicare with plans labeled A-N.

What are the main types of Medicare?

The primary types are Original Medicare (Parts A & B), Medicare Advantage Plans (Part C), and Medicare Prescription Drug plans (Part D). Supplement Plans like Medigap are also available.

How do I choose the best Medicare Plan?

Consider your coverage needs, budget and providers. Seek advice from unbiased sources as every person’s situation is unique. Comparing options takes research but ensures the best fit.

What is the difference between Medicare Advantage and Medicare Supplement Plans?

Medicare Advantage Plans replace Original Medicare. Supplement Plans fill gaps in costs left by Original Medicare Parts A and B. Advantage provides extra benefits often for a higher premium.

When is the best time to enroll in a Medicare Advantage Plan?

The Annual Enrollment Period from October 15th-December 7th, effective coverage starting January 1st each year is the primary opportunity to enroll.

How much does Medicare Part D prescription drug coverage cost?

Costs vary by plan but the average basic premium is about $33/month in 2023. Additional costs include deductibles and coinsurance/copays depending on the specific Part D Plan.

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