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Medicare & Medicaid

Mistake: assuming Medicare is free

Last reviewed November 1, 2026 · 7 min read
Mistake: assuming Medicare is free
Quick answer: Many new beneficiaries make the mistake of assuming Medicare is free, but government health coverage still includes regular costs. While most people pay no premium for Part A, Part B charges an income-based monthly premium and leaves you responsible for a deductible and 20 percent coinsurance. Additional private options, such as Medicare Advantage, Medigap, and Part D drug plans, involve separate premiums, copayments, and out-of-pocket expenses.

Planning for retirement health care requires an accurate look at real medical expenses. When approaching age 65, assuming Medicare is free can derail your personal budget and cause lasting financial strain. Understanding premiums, out-of-pocket shares, and supplemental plan choices ensures you protect both your health and your savings.

Why is assuming Medicare is free a costly mistake?

Assuming Medicare is free is an expensive mistake because Original Medicare requires ongoing premium payments and leaves you responsible for significant shares of your medical bills. A premium is the monthly fee you pay to keep your health coverage active. While you may have paid Medicare taxes throughout your working career, those taxes primarily fund your eligibility for Part A hospital coverage rather than providing zero-cost medical care for life.

Even with standard Medicare coverage, patients face out-of-pocket expenses for doctor visits, hospital procedures, and ongoing therapies. If you do not plan for these expenses, a single medical event can lead to thousands of dollars in bills. Preparing ahead of time by learning the fee structures of Medicare Parts A, B, C, and D helps you budget effectively.

Related reading: Medicare Advantage vs. Medigap: which is better? · Medicare Part A, B, C and D explained

What are the out-of-pocket costs for Part A and Part B?

Original Medicare is split into two distinct parts that each handle different medical needs and charge different fees. Part A covers inpatient hospital stays, hospice care, care in a skilled nursing facility, and some home health care. Most people do not pay a monthly premium for Part A, but receiving inpatient care still involves out-of-pocket costs.

Part B covers doctor services, outpatient medical care, preventive services, and medical supplies. Unlike Part A, Part B requires everyone to pay a monthly premium, which is calculated based on your income. Beyond the monthly premium, Part B includes financial responsibilities you must pay yourself:

  • Deductible: A deductible is the initial amount you must spend on covered care before your plan begins paying its share. You must meet this threshold each year for Part B services.
  • Coinsurance: Coinsurance is the percentage of medical costs you must pay after reaching your deductible. Under Part B, Medicare pays 80 percent of covered outpatient services, leaving you to pay the remaining 20 percent out of pocket.

How do Medigap and Medicare Advantage plan costs compare?

To manage medical expenses, beneficiaries choose between supplementing Original Medicare with a Medigap policy or replacing Original Medicare with a Medicare Advantage plan. Medigap is private health insurance that supplements Original Medicare by paying out-of-pocket expenses like deductibles and copayments. A copayment is a flat fee you pay directly at the time you receive a specific service.

Medicare Advantage plans, also called Part C, are private plans that bundle Part A and Part B benefits and frequently include prescription drug coverage. Advantage plans set their own premiums, deductibles, and copayments each year. To compare costs and features, review how the two pathways operate side by side:

Plan Feature Medigap Plans (plus Original Medicare) Medicare Advantage Plans
Premium costs Higher premiums: $44 to $392 per month (estimated) Lower premiums: $0 to $295 per month (estimated)
Out-of-pocket costs Fewer out-of-pocket costs More out-of-pocket costs
Where you can get care Works in any state Works only in your state, by region
Provider network No provider network needed (unless using Medigap Select) Must use a provider network
Prior authorization In most cases, Original Medicare does not require prior authorization May require prior authorization before services or supplies are covered
Prescription drugs (Part D) Medicare Part D not included Medicare Part D usually included

Prior authorization is formal approval required from an insurance company before you receive certain medical services or supplies. While Medigap plans charge higher monthly premiums, they protect you from unexpected out-of-pocket medical bills and give you the flexibility to visit any provider in the nation who accepts Medicare.

What costs should you expect for prescription drug and supplemental coverage?

Prescription drugs are not covered under Original Medicare Parts A or B. To avoid paying full price for medications, you can buy a standalone Medicare Part D plan from an approved private insurance company, or enroll in an Advantage plan that includes drug benefits. Each plan uses a formulary, which is a health plan’s official list of covered medications, to set prices and tier structures.

If you choose to buy a Medigap plan to cover the 20 percent coinsurance left by Part B, remember these essential rules and expenses:

  • You must keep paying your regular monthly Part B premium to Medicare in addition to your private Medigap premium.
  • Medigap policies cover only one person, meaning spouses must purchase separate policies.
  • Plans are guaranteed renewable as long as you pay your monthly premiums, meaning the insurer cannot cancel your coverage due to new health conditions.
  • Private insurers must be licensed in your state to sell you a policy.
  • If you miss your initial six-month enrollment window—which starts the day you are at least 65 and enrolled in both Part A and Part B—insurers may require you to pass a written health screen before selling you a policy.

Does Medicare cover long-term care expenses?

Medicare does not cover long-term care for basic personal needs, leaving another substantial expense that many consumers overlook. Source data shows that Medicare covers post-acute care rather than ongoing custodial care. Research published in the journal Inquiry by Kemper, Komisar, and Alecxih indicates that most people who turned 65 in 2005 will require some level of long-term care during their lifetime, including 58 percent of men and 79 percent of women.

When long-term care is needed, assisted living facilities and nursing homes can be very costly. A 2005 MetLife Mature Market Institute survey reported an average national cost of $100 per day for assisted living facilities, with rates ranging from $55 to $155 per day across the United States. Relying on Medicare to pay for these ongoing personal care costs is an error that can quickly drain personal savings.

How do enrollment deadlines impact what you pay?

Signing up at the wrong time can permanently increase your Medicare costs. Your initial enrollment window spans seven months: it begins three months before your 65th birthday, includes your birth month, and extends for three months after your birthday. If you fail to enroll during this period, you may be charged higher monthly premiums as a penalty once you finally sign up.

You can delay enrollment without penalties if you have health insurance through an active job, but you must check with your employer’s benefits manager to confirm the plan qualifies. If you are already collecting Social Security or disability benefits when you become eligible, enrollment in Part A hospital care and Part B medical services happens automatically.

Key takeaways

  • Part A is premium-free for most beneficiaries, but Part B charges an ongoing monthly premium based on your income.
  • Under Original Medicare, you must pay a yearly Part B deductible and 20 percent coinsurance for doctor visits and outpatient care.
  • Missing your initial seven-month enrollment window can lead to permanent late-enrollment penalties that raise your premiums.
  • Medigap plans help cover deductibles and coinsurance, but they require a separate monthly premium and do not include Part D prescription drug coverage.
  • Medicare does not cover ongoing long-term care or assisted living expenses, which can create significant out-of-pocket costs.

Common mistakes to avoid

  • Assuming Medicare covers 100 percent of medical bills: Original Medicare has no cap on your 20 percent coinsurance responsibility unless you purchase a Medigap plan or enroll in Medicare Advantage.
  • Missing your initial enrollment window: Failing to enroll within three months before or after your 65th birthday can trigger permanent lifetime premium surcharges unless you have qualifying employer health insurance.
  • Expecting Medicare to pay for assisted living: Medicare covers post-acute medical recovery, not ongoing custodial or long-term nursing home care.
  • Waiting too long to buy Medigap: If you apply outside your initial six-month open enrollment window, private insurance companies may require a written health screening and can deny you coverage.

Frequently asked questions

Where can I get unbiased assistance with Medicare choices?

You can use the Medicare Plan Finder on Medicare.gov to evaluate plan costs, drug formularies, and customer satisfaction ratings. Texas residents can call the Area Agencies on Aging at 800-252-9240, while Washington residents can consult volunteer Statewide Health Insurance Benefits Advisors (SHIBA) for free, confidential guidance.

Are Medicare Advantage plans free if they advertise a zero-dollar premium?

Even if a Medicare Advantage plan advertises a $0 monthly premium, you must continue paying your monthly Part B premium to the federal government. Additionally, Advantage plans charge deductibles, copayments for individual medical services, and fees for seeing providers outside their regional network.

Does a Medigap policy cover my prescription drug bills?

Medigap policies do not include Medicare Part D prescription drug benefits. If you choose Original Medicare and a Medigap plan, you must purchase a separate standalone Part D plan to cover retail medication expenses.

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