A plain-English Medicare guide
Medicare is not one single plan—it is a set of building blocks. Whether you are helping a parent or reviewing your own options, here is how Parts A, B, C, D, and Medigap fit together.
October 15–December 7 · Open Enrollment is live
Plans can change their drug lists, doctor networks, and costs. Catch surprises before the new coverage year begins.
Medicare is the federal health insurance program for people 65 and older and some younger adults with disabilities or specific conditions. Unlike most employer insurance, Medicare is individual coverage—there are no family or spouse plans. Two people in the same household can have different plans, doctors, and enrollment rules.
Start with the four letters of Medicare—and the two main ways people put them together:
Together, Part A and Part B are Original Medicare. Medigap, Medicaid, and employer coverage are separate ways some people help cover costs or services Medicare leaves behind.
Part A is premium-free for most people. Part B usually has a monthly premium—even with Medicare Advantage—and it may be deducted before a Social Security payment reaches the bank.
2026 amounts
Part A · Hospital insurance
About 99% qualify through their own or a spouse's work record—usually at least 40 quarters—generally 10 years—of Medicare-covered work.
Without enough work history: $311 or $565/month, depending on credits.
Part B · Medical insurance
The 2026 standard premium for most people. It is owed with Original Medicare and Medicare Advantage unless another program pays it.
If someone receives Social Security or Railroad Retirement benefits, this premium—including any Part B late-enrollment penalty—is usually deducted automatically. Otherwise, Medicare sends a bill.
Medicare Advantage advertising
It charges no additional plan premium. Part B and other deductibles, copays, or coinsurance may still apply. Compare total expected cost—not the headline alone.
A person can earn up to 4 credits a year. In 2026, one credit requires $1,890 in covered earnings; earning $7,560 during the year earns all 4. The earnings threshold changes annually.
Before assuming someone must pay for Part A, ask Social Security to check the person’s own record and any qualifying current-spouse, former-spouse, or survivor record.
The Income-Related Monthly Adjustment Amount (IRMAA) raises Part B and Part D premiums for higher-income beneficiaries. For 2026, Medicare generally looks at modified adjusted gross income from the 2024 tax return. Certain life-changing events can support an appeal through Social Security.
Medicare Savings Programs may help eligible people pay Part A and/or Part B premiums and other Medicare costs.
The easiest way to identify the path is to look at the cards. Original Medicare is federal Part A and Part B with optional separate coverage. Medicare Advantage is the other way to receive Part A and Part B through a private plan.
Example wallet: path one
Part D and Medigap are separate. You can have either one without the other.
Federal coverage
Part A + Part B
The red, white, and blue Medicare card is still the foundation.
Optional private supplement
Example name: UnitedHealthcare Medicare Supplement Plan G
The plan letter names the benefits. The insurer name does not.
Optional private drug plan
Example name: Aetna Medicare Rx Plan (PDP)
Prescription drug coverage only. It is not Medigap.
Employer, union, Medicaid, or VA coverage can replace an add-on or sit alongside Medicare. Confirm with the benefits administrator before changing Part D or Medicare Advantage. Review retiree coverage rules
Example wallet: path two
Medicare-approved private plan
Example name: Humana Medicare Advantage HMO with Part D
The card may say HMO, PPO, or SNP and usually serves as the main card shown for covered care.
Keep the red, white, and blue Medicare card in a safe place even when a Medicare Advantage plan card is used for care.
Illustrations only—not real insurance cards, plan recommendations, or a complete list of coverage someone may carry. Names and card designs vary by insurer and location.
This following is a comparison of the different tradeoffs between Original Medicare and Medicare Advantage, not a recommendation. Both paths can be right for different people and different years.
| Question | Original Medicare | Medicare Advantage |
|---|---|---|
| Who provides the coverage? | The federal Medicare program | A Medicare-approved private plan |
| Doctors and hospitals | Any U.S. provider that takes Medicare; ask whether they accept Medicare’s approved amount (called assignment), since that can affect cost | Usually a local provider network for non-emergency care |
| Specialists | Usually no referral required | A referral may be required |
| Drug coverage | Add a separate Part D plan unless other creditable coverage applies | Usually included in the plan |
| Additional benefits | Does not generally include routine dental, vision, or hearing benefits | May include additional benefits; details vary by plan |
| Premium structure | The Part B premium, plus separate Part D or Medigap premiums if added | The Part B premium continues; the plan may charge an additional premium, though some have a $0 plan premium |
| Out-of-pocket protection | No annual out-of-pocket maximum for Part A and Part B unless other coverage helps | Plans have an annual limit for covered Part A and Part B services |
| Supplemental coverage | Can work with Medigap, Medicaid, or some employer/union coverage | Cannot be paired with Medigap; may coordinate with Medicaid or employer/union coverage |
| Plan rules | Usually no prior authorization for covered services | May require prior authorization for some services |
Who provides the coverage?
Doctors and hospitals
Specialists
Drug coverage
Additional benefits
Premium structure
Out-of-pocket protection
Supplemental coverage
Plan rules
The right questions are not only “What is the premium?” Ask whether the person’s doctors, hospitals, prescriptions, pharmacy, travel needs, and expected care still fit the coverage. A provider network is the group of doctors, hospitals, pharmacies, and other providers that contract with a plan; using care outside it may cost more or may not be covered except in specific situations.
A low monthly premium does not necessarily mean a low-cost year. Hospital care, specialists, imaging, rehabilitation, and follow-up visits can expose the tradeoff between paying an additional premium for supplemental coverage and paying the cost sharing set by a Medicare Advantage plan.
Hospital and outpatient cost sharing can add up, and Original Medicare has no yearly out-of-pocket limit for Part A and Part B services.
Ask: What would cover a second hospital benefit period or repeated outpatient care?
The person pays an additional monthly premium. Every standardized Medigap plan covers Part A hospital coinsurance and additional hospital days; coverage of the Part A deductible and other cost sharing varies by plan letter.
Ask: Which costs does this exact plan letter cover, and what remains separate?
The plan sets copays or coinsurance and a yearly limit for covered Part A and Part B services. Network and approval rules can affect access and cost.
Ask: What is the plan’s inpatient copay, medical out-of-pocket limit, network, and prior-authorization policy?
This is a planning model, not a cost prediction. Compare the exact plan’s annual premium, hospital and outpatient cost sharing, medical out-of-pocket limit, drug costs, network, and approval rules. Medigap coverage also varies by plan letter.
These are not three more versions of Medicare. They solve different cost problems and can overlap when someone qualifies.
Private supplemental insurance that helps with a person's share of costs under Original Medicare. It does not work with Medicare Advantage, and policies sold today do not include Part D drug coverage.
State-administered health coverage that can work alongside Medicare. Depending on eligibility and the state, it may cover Medicare cost sharing and services Medicare does not cover.
Medicaid-administered programs that can help pay Part A and/or Part B premiums and, for some pathways, deductibles and coinsurance. Qualifying for an MSP also brings Extra Help with Part D costs.
A Medicare program that lowers Part D prescription-drug costs for people with limited income and resources. It is not Medigap.
Medigap helps with Original Medicare cost sharing. Extra Help helps with Part D drug costs. They are not interchangeable.
A Special Needs Plan (SNP) is not a third path. It is a Medicare Advantage plan built for a defined group. The person still needs Part A and Part B, must live in the plan’s service area, and must meet that plan’s eligibility rules. Every SNP includes Part D drug coverage, while networks, referrals, and costs vary by plan.
Medicare + Medicaid
For people who have Medicare and a Medicaid category accepted by the plan; it can coordinate benefits across both programs.
Specific chronic condition
For people with one or more severe or disabling chronic conditions served by that plan.
Institutional level of care
For someone living in an institution or meeting the plan’s institutional-level care requirements.
A person can have Medicare and coverage from their own job, a spouse’s current job, a former employer, a union, or COBRA. Which plan pays first—and whether Part B can safely be delayed—depends on the type of coverage and employment situation.
If a Health Savings Account is involved, get individualized guidance before enrolling in Medicare. Retroactive Part A coverage can affect HSA contribution timing—this is a prompt to verify, not tax advice.
Why this is worth understanding
These are not small administrative choices. Medicare covers a large and growing share of the country, Medicare Advantage now serves more than half of beneficiaries, and medical costs can consume a meaningful share of retirement income. Caregivers often become the people connecting plan rules, providers, medications, and bills.
The 18% figure is a benchmark against the average Social Security benefit—not an estimate of what every person pays. It also excludes some other expenses, such as many drug, dental, and long-term-care costs.
See the Medicare spending facts and methodology from KFFSome decisions depend on plan documents, employment status, state Medigap rules, prescriptions, and provider networks. That is where a trained human is useful—not as a gate before learning the basics, but as backup before a consequential change.
Blaze provides educational guidance, not insurance, legal, or tax advice. Plan availability, costs, networks, and individual rights vary. Confirm a decision with Medicare, the plan, a benefits administrator, or a SHIP counselor.