Medicare 101
Medicare Eligibility
Most people become eligible for Medicare at age 65, but the details decide whether you should enroll right away or wait. You also qualify before 65 if you've received Social Security Disability benefits for 24 months, or have ALS or End-Stage Renal Disease. You get premium-free Part A if you or your spouse paid Medicare taxes for at least 10 years (40 quarters of work). Here's how to tell where you stand.
Eligibility at 65
If you're a U.S. citizen or a legal resident of at least five years and you're turning 65, you're eligible for Medicare. Premium-free Part A depends on your (or a spouse's) 40 quarters of Medicare-taxed work; if you don't have enough quarters, you can still buy Part A. Part B is available to essentially everyone at 65 for the standard premium.
Eligibility before 65
You qualify early if you've collected Social Security Disability Insurance for 24 months (Medicare starts automatically in month 25), or immediately if you have ALS (Lou Gehrig's disease) or End-Stage Renal Disease requiring dialysis or a transplant. The rules for ESRD are specific — we help younger clients navigate them.
Still working at 65? Read this first
If you or your spouse are still working and covered by a large employer plan (20+ employees), you can usually delay Part B without penalty and pick it up later through a Special Enrollment Period. But if the employer has fewer than 20 employees, Medicare typically becomes primary and you should enroll on time. Getting this wrong is the most common — and most expensive — Medicare mistake we fix.
Premium-free Part A and 'quarters'
A 'quarter of coverage' is a three-month block in which you earned enough to get a Social Security credit. Forty of them (about 10 years of work) earns premium-free Part A. If you're short, a current or former spouse's record may qualify you. We can help you confirm your quarters with Social Security.
How we help
We confirm your eligibility date, tell you whether to enroll now or delay penalty-free, and coordinate the timing with your employer coverage — so you never trigger a lifelong penalty by accident. Free, and no pressure.
Automatic vs. manual enrollment
If you're already receiving Social Security or Railroad Retirement benefits before 65, you're usually enrolled in Parts A and B automatically and your red-white-and-blue card arrives about three months before your birthday. If you're not yet drawing benefits — increasingly common as people delay Social Security — you have to sign up yourself through Social Security. Assuming it happens automatically when it doesn't is a common way people miss their window.
Eligibility if you're not a U.S. citizen
Lawful permanent residents can qualify for Medicare, typically after five years of continuous legal residence, and may buy Part A if they don't have enough work quarters. The rules can get technical depending on your immigration status and work history, so if this is your situation, reach out and we'll help you sort out exactly what you qualify for and when.
Disability, ESRD, and re-qualifying
If you qualified for Medicare under 65 through disability and then return to work, you may keep Medicare for a time or have options to buy back in — the rules are specific. End-Stage Renal Disease eligibility also has its own timeline tied to when dialysis or a transplant begins. These situations are where a licensed agent earns their keep, so don't try to decode them alone; we'll walk you through your exact eligibility.
Local Medicare help across the Western Slope
Medicare rules are federal, but the plans, provider networks, and prices are local — and they change every year. Medicare On Main is an independent agency based in Grand Junction, Colorado (Mesa County), serving Grand Junction, Fruita, and Palisade plus Moab (Grand County) and Monticello (San Juan County), Utah — and Brian Penner is licensed in 18 states. We compare the plans we offer in your county against your own doctors, prescriptions, and budget, confirm your local providers are in-network, and stay your advisor for claims, appeals, and the annual review — at no cost to you, because carriers pay licensed agents, not you. That local, year-round help is the difference between reading about Medicare and having a plan built around your life.
Questions, answered
Do I have to take Medicare at 65?
Not always. If you have creditable coverage from a large employer, you can usually delay Part B penalty-free and enroll later through a Special Enrollment Period. Without creditable coverage, delaying causes lifelong Part B and Part D penalties. We check your specific situation.
How do I qualify for premium-free Part A?
You or your spouse must have paid Medicare taxes for at least 10 years (40 quarters). If you have fewer quarters you can still buy Part A, or a spouse's work record may qualify you.
Can I get Medicare before 65?
Yes — after 24 months of Social Security Disability benefits, or immediately with ALS or End-Stage Renal Disease. The starting rules differ for each, so ask us if this applies to you.
My spouse is still working and I'm turning 65 — what do I do?
It depends on the size of the employer and whether that plan is creditable. This is exactly the kind of timing question we sort out for free so you don't accidentally take on a penalty.
Official Medicare sources
We point you to the federal sources so you can verify everything. For current-year figures and to compare the plans available in your area:
- Medicare.gov — the official U.S. government site for Medicare costs, coverage, and rules.
- Medicare Plan Compare — the official tool to compare Medicare Advantage and Part D plans by ZIP.
- Social Security (ssa.gov) — enroll in Medicare Parts A & B and check your eligibility.
- CMS.gov — Centers for Medicare & Medicaid Services, which runs the program.
Education and estimates only — confirm current figures on Medicare.gov before enrolling. We do not offer every plan available in your area.
Talk to a local Medicare advisor
Free, no pressure — we compare your options for you.
Last updated . Maintained by the Medicare On Main Data Desk · reviewed by Brian Penner, Independent Medicare advisor (NPN 16493717).