Medicare, Explained Without the Alphabet Soup.
Learn how Medicare works, compare your main coverage choices, understand enrollment timing, estimate possible late-enrollment penalties, and prepare for a Medicare review.
Start With the Four Main Parts
Medicare can feel complicated because different letters handle different pieces of your healthcare. Here is the simple version.
Part A · Hospital
Helps cover inpatient hospital care, skilled nursing facility care, hospice care and certain home health services.
Part B · Medical
Helps cover doctors, outpatient care, preventive services, durable medical equipment and certain home health services.
Part C · Medicare Advantage
A Medicare-approved private plan that provides your Part A and Part B benefits and usually includes Part D drug coverage.
Part D · Prescription Drugs
Helps cover prescription medications through a Medicare drug plan or through many Medicare Advantage plans.
Original Medicare or Medicare Advantage?
After enrolling in Parts A and B, most people make an important choice about how they want to receive their Medicare coverage.
| Consider | Original Medicare | Medicare Advantage |
|---|---|---|
| How coverage works | Part A + Part B through Original Medicare. You may add a separate Part D plan and may be able to buy a Medicare Supplement policy. | Medicare benefits are provided through a Medicare-approved private plan. Plans include Part A and Part B and usually Part D. |
| Doctors & hospitals | You can generally use any doctor or hospital in the U.S. that accepts Medicare. | You may need to use the plan's network for non-emergency care. Network rules vary by plan. |
| Drug coverage | You can add a stand-alone Medicare Part D drug plan. | Most Medicare Advantage plans include Part D drug coverage. |
| Out-of-pocket limit | Original Medicare alone does not have a yearly out-of-pocket maximum for Part A and B services. | Medicare Advantage plans have a yearly limit on what you pay for covered Medicare services. |
| Extra benefits | Original Medicare generally does not include routine dental, vision or hearing benefits. | Some plans offer additional benefits such as certain dental, vision or hearing services. Benefits vary by plan. |
Where Medigap Fits In
Medicare Supplement insurance, also called Medigap, works with Original Medicare rather than replacing it.
Helps With Cost Sharing
Medigap policies can help pay certain deductibles, coinsurance and copayments left by Original Medicare, depending on the plan.
Works With Original Medicare
You generally keep the broad provider access of Original Medicare and use providers that accept Medicare.
Drug Coverage Is Separate
Modern Medigap policies do not include outpatient prescription drug coverage. A separate Part D plan may be needed.
When Can You Enroll or Make Changes?
Enrollment windows matter. Missing the right window can cause delays or, in some situations, late-enrollment penalties.
Initial Enrollment Period
For most people turning 65, this is a 7-month period beginning 3 months before the month you turn 65, including your birthday month, and ending 3 months afterward.
Special Enrollment Period
Certain circumstances may allow you to enroll outside the normal window. One common example involves delaying Part B while covered through current employment for you or your spouse. Specific rules apply.
General Enrollment Period
If you missed your opportunity to enroll in Part B and do not qualify for a Special Enrollment Period, the General Enrollment Period runs from January 1 through March 31.
Medicare Open Enrollment
From October 15 through December 7, people with Medicare can generally review and make certain changes to Medicare Advantage and Part D coverage for the following year.
A Few Numbers Worth Knowing
These amounts can change each year. The figures below are for 2026 and should be updated when Medicare publishes new annual amounts.
Part B Premium
$202.90 per month for the standard 2026 Part B premium. Some beneficiaries pay more based on income.
Part B Deductible
$283 in 2026 before Original Medicare begins paying its share of Part B-covered services.
Part A Deductible
$1,736 per benefit period in 2026 for inpatient hospital care under Original Medicare.
Medicare Cost & Penalty Calculators
Use these tools to estimate late-enrollment penalties and possible IRMAA surcharges. Exact costs depend on Medicare rules, enrollment history, income, filing status and Social Security's determination.
Late Enrollment Penalty Calculator
Estimate the monthly Part B surcharge based on the current standard Part B premium and the number of months entered.
Late Enrollment Penalty Calculator
Estimate the monthly Part D penalty using the national base beneficiary premium and the number of full months entered.
IRMAA Calculator
Estimate how Modified Adjusted Gross Income from two years earlier may affect Medicare Part B and Part D costs, and see how close the income is to the next lower bracket.
Make Your Medicare Appointment Easier
Having the right information ready ahead of time can make a Medicare review faster and more useful.
Complete Your Medicare Information Before We Meet
Use our secure Medicare member survey to provide information about your medications and healthcare needs before your appointment. This helps us prepare and can speed things along when we review your options.
Complete Medicare SurveyHelpful Things to Have Ready
Common Medicare Questions
These are some of the questions we hear most often from people approaching Medicare or reviewing their current coverage.
Not everyone is automatically enrolled. Automatic enrollment often depends on whether you are already receiving certain Social Security or Railroad Retirement benefits. If you are not automatically enrolled, you may need to sign up.
Possibly. The correct approach depends on the type of employer coverage you have and your specific circumstances. Coverage based on current employment can create a Special Enrollment Period in some situations. COBRA, retiree coverage and Marketplace coverage are not the same as active employer coverage for Medicare enrollment purposes.
No. Medicare Advantage is another way to receive your Medicare Part A and Part B benefits through a Medicare-approved private plan. You generally must remain enrolled in Parts A and B and continue paying the Part B premium.
No. Medicare Supplement policies work with Original Medicare. They cannot be used to cover Medicare Advantage plan copays, deductibles or premiums.
Original Medicare does not generally provide routine outpatient prescription drug coverage. People with Original Medicare can generally add a separate Medicare Part D drug plan.
Original Medicare generally does not cover most routine dental care or routine eye exams for eyeglasses. Some Medicare Advantage plans may offer additional dental, vision or hearing benefits. Plan benefits vary.
It can be wise to review coverage each year because plan premiums, formularies, pharmacy arrangements, provider networks, benefits and cost sharing can change. Your own prescriptions and healthcare needs can change too.
There is generally no separate charge added to your Medicare plan premium for working with a licensed insurance agent. Agents may be compensated by insurance companies when an enrollment occurs.
Useful Medicare & Social Security Links
For government information, enrollment and official Medicare records, these are good places to start.
Medicare.gov
Official Medicare information, coverage details, plan information and Medicare account resources.
Visit Medicare.gov →Social Security
Apply for Medicare Part A and Part B, review Social Security benefits and manage your Social Security account.
Medicare Enrollment at SSA →Medicare Plan Finder
Review Medicare Advantage and prescription drug plans available in your area through Medicare's official plan finder.
Open Plan Finder →Learn First. Then Compare Your Options.
This Resource Center is here to help you understand Medicare. When you're ready to look at coverage options or talk through your situation, head back to our main Medicare page or give us a call.
Explore Medicare Coverage
Visit our main Medicare page to learn more about the Medicare services and coverage options we help clients review.
Go to Medicare Page →Complete Your Medicare Survey
Share your prescriptions and healthcare information before your appointment so we can prepare for your review.
Start Medicare Survey →Talk With Us
Have a Medicare question that doesn't fit neatly into a webpage? Call C&J Isbell Brokerage Group directly.
Call (205) 671-2835 →You Don't Have to Figure Medicare Out Alone.
Whether you're turning 65, retiring, reviewing your current plan or simply trying to understand your choices, C&J Isbell Brokerage Group can help you sort through the options.
This page is for general educational purposes only. Benefits, provider networks, formularies, premiums, enrollment eligibility and plan availability vary by plan, county and individual circumstances. Medicare costs and rules can change.
Not affiliated with or endorsed by the U.S. government or the federal Medicare program.