Part A: Hospital Insurance
Helps cover inpatient hospital care, skilled nursing facility care under certain conditions, hospice, and some home health care.
New to Medicare Guide
New to Medicare? Start Here.
A plain-English guide to help you understand Medicare, avoid common mistakes, and make decisions in the right order.
Medicare feels overwhelming when every question arrives at once. This guide slows it down and gives you a calmer sequence to follow.
Should I enroll in Part B?
Do I need Part D?
Supplement or Advantage?
Can I keep working?
What happens with my HSA?
What if my spouse is not Medicare eligible?
You can bookmark this page and return anytime. The guide is not locked behind another form.
Start Here
The Medicare decision is really a sequence of smaller decisions.
Most people think Medicare is one big decision. It is not. It is a sequence of smaller decisions, and the order matters.
Start with this order
- Decide when you need Medicare Part A and Part B.
- Decide whether Original Medicare or Medicare Advantage is the better path to compare.
- If you choose Original Medicare, decide whether to add a Medicare Supplement.
- Include prescription drug coverage planning as part of the broader Medicare decision.
- Check doctors, hospitals, prescriptions, travel, budget, and plan rules.
- Coordinate spouse coverage, employer coverage, HSA timing, and retirement dates.
Sam's Note
The biggest Medicare mistakes usually happen when someone makes a plan decision before answering the timing questions. The first question is not "Which plan should I buy?" The first question is "When do I actually need Medicare to start?"
The Big Picture
The four main parts of Medicare.
Part B: Medical Insurance
Helps cover doctor visits, outpatient care, preventive services, lab work, durable medical equipment, and many medically necessary services outside the hospital.
Part C: Medicare Advantage
A private-plan path for receiving Medicare benefits. Plans can include networks, copays, prior authorization rules, and an annual out-of-pocket maximum.
Part D: Prescription Drug Coverage
Prescription drug coverage through a private insurance company. It may be separate or included in some Medicare Advantage plans.
Think of Original Medicare as the foundation. Part A covers hospital-related care, and Part B covers medical care. Then you decide how you want to handle the gaps: either with a Medicare Supplement and Part D, or through a Medicare Advantage plan.
Timeline
Your Medicare timeline.
6 to 12 months before Medicare
- Learn the basics.
- Determine whether Medicare is needed at 65.
- Review employer coverage if you or your spouse are still working.
- Review HSA rules before making contributions close to Medicare enrollment.
- Create or check your Social Security account.
3 months before Medicare
- Apply for Part A and Part B if needed.
- Compare Medicare Supplement, Medicare Advantage, and Part D options.
- Review prescriptions and preferred pharmacies.
- Confirm doctors, hospitals, and travel needs.
- Ask how spouse or dependent coverage may be affected.
Your Medicare start month
- Make sure your Medicare card is correct.
- Confirm effective dates for medical and drug coverage.
- Set up premium payments if needed.
- Give new insurance information to doctors and pharmacies.
After Medicare starts
- Keep plan documents in one place.
- Revisit prescription coverage when medications, pharmacies, or plan details change.
- Tell the office if your doctors, income, address, or coverage needs change.
- Review annually when appropriate.
Important
Your Initial Enrollment Period generally lasts seven months: the three months before the month you turn 65, your birthday month, and the three months after. If you are already receiving Social Security benefits before 65, you may be enrolled automatically. If not, you usually need to actively sign up.
Original Medicare vs Advantage
The biggest choice: Original Medicare or Medicare Advantage.
Once Part A and Part B are handled, most people compare two different paths.
Original Medicare + Supplement + Part D
This route usually includes Medicare Part A, Medicare Part B, a Medicare Supplement, also called Medigap, and prescription drug coverage through Part D.
Things people like
- Broad access to providers who accept Medicare.
- Often predictable medical costs.
- Good fit for people who travel or value flexibility.
- Less concern about local plan networks.
Things to understand
- Usually higher monthly premiums than many Medicare Advantage plans.
- Does not include routine dental, vision, hearing, or drug coverage by itself.
- You usually need separate Part D coverage.
- After your Medigap Open Enrollment window, switching Supplements may require medical underwriting in many situations.
Medicare Advantage
This route uses a private Medicare Advantage plan to receive Medicare benefits. Many plans include drug coverage, but plan rules and networks matter.
Things people like
- Often low monthly premiums.
- Many plans include drug coverage.
- May include extra benefits such as dental, vision, hearing, fitness, or over-the-counter benefits.
- Has an annual out-of-pocket maximum for covered medical services.
Things to understand
- Networks and service areas matter.
- Referrals or prior authorization may be required.
- Out-of-pocket costs can be higher in a difficult health year.
- Benefits, networks, and drug coverage can change.
- Returning to a Medicare Supplement later may not be guaranteed in many situations.
Sam's Note
I do not think the same answer is right for everyone. Some people value flexibility and predictable medical costs. Others are comfortable with networks and copays in exchange for lower premiums. The right choice depends on your doctors, medications, budget, travel habits, and how much risk you are comfortable keeping.
Which sounds more like you?
Choose the statement that feels closest to your situation.
Supplements
What is a Medicare Supplement?
A Medicare Supplement, also called Medigap, is private insurance that works with Original Medicare. Original Medicare pays first. The Supplement helps pay some or most of the remaining Medicare-approved costs, depending on the letter plan you choose.
Important
- You must have Part A and Part B to buy a Medicare Supplement.
- A Supplement is not the same as Medicare Advantage.
- A Supplement usually does not include prescription drug coverage.
- You generally pair a Supplement with Part D coverage.
The Medigap Open Enrollment window
Your federal Medigap Open Enrollment Period lasts six months. It starts the first month you are both 65 or older and enrolled in Part B. During this window, you usually have the strongest right to buy a Medicare Supplement.
Plan G is one of the most common Medicare Supplement options for people new to Medicare. It generally leaves you responsible for the Part B deductible, then covers many of the remaining Medicare-approved gaps.
Plan N can have a lower premium than Plan G, but you may have office visit and emergency room copays. It also does not cover Part B excess charges.
High Deductible Plan G usually has a lower premium, but you must pay Medicare-approved costs up to the high deductible amount before the plan begins paying.
Part D Planning
Do not skip the prescription coverage conversation.
Prescription drug coverage is reviewed as part of the broader Medicare planning process, especially for people who are new to Medicare or actively working with our office on their Medicare coverage.
If you choose Original Medicare and a Supplement, you typically need Part D coverage. If you choose Medicare Advantage, drug coverage is often included, but not always.
Part D planning points
- Exact medication names.
- Dosage and quantity.
- Preferred pharmacies and mail-order preference.
- Formulary status.
- Prior authorization, step therapy, or quantity limits.
- Total estimated yearly cost, not just the monthly premium.
Sam's Note
Choosing drug coverage based only on the monthly premium can be a mistake. A low-premium option can still be expensive if your pharmacy is not preferred or your medication is not covered well.
Working Past 65
What if you are still working at 65?
If you or your spouse are still working and you have employer group health coverage, you may not need to take all parts of Medicare right away. But you should not assume every employer plan works the same way.
The rules can depend on
- Employer size.
- Whether coverage is based on current employment.
- Whether the plan is employer group coverage.
- Whether you have COBRA, retiree coverage, Marketplace coverage, VA coverage, or another type of coverage.
- Whether you contribute to an HSA.
- Whether your spouse or dependents rely on your coverage.
If your employer has 20 or more employees and your coverage is based on current employment, you may be able to delay Part B without penalty. Confirm with the employer and benefits administrator.
If the employer has fewer than 20 employees, Medicare may need to be primary when you turn 65. Verify how the plan coordinates before delaying Part A or Part B.
COBRA and retiree coverage are not the same as active employer coverage. Do not assume they let you safely delay Medicare.
Once you are enrolled in Medicare, you generally cannot continue contributing to an HSA. If you enroll in premium-free Part A after 65, Part A can be retroactive up to six months, but not earlier than the month you became eligible for Medicare.
Sam's Note
The HSA issue is one of the most overlooked Medicare timing problems. Before you enroll in Medicare or Social Security, make sure HSA contributions are coordinated properly.
Common Mistakes
Common Medicare mistakes to avoid.
Assuming Medicare starts automatically for everyone
Some people are enrolled automatically. Others need to actively sign up.
Delaying Part B without confirming employer coverage rules
Not all coverage lets you delay Part B safely.
Thinking COBRA protects you from Medicare penalties
COBRA is not treated the same as active employer coverage.
Forgetting about the HSA rule
Medicare enrollment and HSA contributions need to be coordinated carefully.
Choosing a plan before checking doctors
Doctors, hospitals, and networks can matter a lot, especially with Medicare Advantage.
Choosing drug coverage based only on premium
Prescription coverage should be considered by total yearly cost, pharmacy, formulary, and restrictions.
Assuming you can always switch later with no health questions
In many cases, getting a Supplement later may require underwriting.
Ignoring spouse timing
One spouse going onto Medicare can affect employer coverage, dependents, HSA contributions, and household premiums.
Missing IRMAA
Higher-income Medicare beneficiaries may pay more for Part B and Part D because of income-related monthly adjustment amounts.
Treating Medicare like a one-time decision
Medicare should be revisited when prescriptions, doctors, income, address, or plan benefits change.
Checklist
Your New to Medicare checklist.
Timing
Employer Coverage
HSA
Coverage Choice
Prescriptions
Final Steps
Examples
Real-life Medicare scenarios.
Turning 65 and retiring
Your Medicare start date, employer coverage end date, and plan effective dates need to line up cleanly.
Still working with large employer coverage
You may be able to delay Part B, but confirm the employer rules and HSA impact first.
Leaving employer coverage after 65
You may need a Special Enrollment Period and employer verification before Part B starts.
Married couple with different Medicare dates
One spouse starting Medicare can affect dependent coverage, employer premiums, and household timing.
No prescriptions
Even if you take no medications, Part D decisions can involve future needs and enrollment rules.
Plain English
Medicare terms translated.
Premium
The amount you pay each month to have coverage.
Deductible
The amount you pay before insurance starts paying certain costs.
Copay
A flat amount you pay for a service or prescription.
Coinsurance
A percentage of the cost you pay.
Out-of-Pocket Maximum
The most you pay in a year for certain covered services under a plan.
Formulary
The list of drugs covered by a drug plan.
Prior Authorization
Approval required before a plan covers certain services or medications.
Network
The doctors, hospitals, pharmacies, and providers that contract with a plan.
Medigap
Another name for Medicare Supplement insurance.
IRMAA
An income-related surcharge that higher-income Medicare beneficiaries may pay for Part B and Part D.
You do not have to figure this out alone.
A planning call can help you sort timing, coverage paths, doctors, prescription coverage, employer coverage, spouse timing, and budget in the right order.