The Ultimate Medicare Guide for 2026

This page is written for people turning 65 and for anyone already on Medicare who is re-shopping coverage. It is educational first. A free consult with Dalton Insurance Agency can apply these rules to your zip code, but the explanations below are meant to stand on their own. For a shorter overview, see Medicare 101. Official program rules live at Medicare.gov.

What Original Medicare actually covers, and what it does not

Original Medicare is the federal program itself: Part A (hospital insurance) and Part B (medical insurance). You can see any provider in the United States that accepts Medicare. There is no plan network and, for most services, no referral. That freedom is the foundation. The cost-sharing rules are the part most people underestimate.

Part A: hospital insurance

Part A covers inpatient hospital stays, skilled nursing facility (SNF) care after a qualifying inpatient stay, hospice, and some home health. About 99% of people pay no Part A premium because they or a spouse paid Medicare taxes for at least 40 quarters, roughly 10 years. If you have 30 to 39 quarters, the 2026 Part A premium is $311 a month. With fewer than 30 quarters it is $565 a month.

The number that actually hits people is the deductible. In 2026 the Part A inpatient hospital deductible is $1,736 per benefit period, not per calendar year. A benefit period begins when you are admitted as an inpatient and ends when you have been out of the hospital (and have not been receiving skilled care in a SNF) for 60 days in a row. Two unrelated hospital stays months apart can each trigger a fresh $1,736.

After the deductible, Part A covers days 1 through 60 of that benefit period. Days 61 through 90 cost $434 per day in 2026. After that you have 60 lifetime reserve days at $868 per day, and those days never reset. Skilled nursing facility care, when you qualify, is covered for up to 100 days per benefit period: days 1 through 20 with no daily coinsurance after a qualifying three-day inpatient hospital stay, then $217 per day for days 21 through 100. After day 100, Medicare stops paying for that stay.

Two limits get missed. First, observation status is not an inpatient admission. You can spend nights in a hospital bed, receive a large bill under Part B, and never trigger the three-day stay that Medicare requires before it pays for a skilled nursing facility. Second, Part A does not pay for custodial long-term care: help with bathing, dressing, and eating in a nursing home or assisted living. That is a different problem from a short skilled stay after surgery.

Part B: medical insurance

Part B covers doctor visits, outpatient hospital services, emergency-room care that is not an inpatient admission, preventive visits, lab work, imaging, durable medical equipment, some outpatient mental health care, and many injectable drugs given in a clinic. Almost everyone pays a premium for Part B. The 2026 standard monthly premium is $202.90. The annual Part B deductible is $283. After the deductible, Medicare typically pays 80% of the approved amount for most services and you pay the other 20%.

Higher-income beneficiaries pay more than $202.90 through IRMAA, explained later. People who are not drawing Social Security yet are billed for Part B, often quarterly, instead of having the premium taken from a benefit check. A first invoice around three months of premium is normal; it is not a penalty.

What Original Medicare leaves out

Original Medicare is strong on hospital care, surgery, doctor visits, and preventive services. It is weak or silent on several everyday costs:

• The uncapped 20% Part B coinsurance after the $283 deductible
• The Part A hospital deductible each benefit period, plus daily coinsurance on long stays
• Prescription drugs you take at home (that is Part D)
• Routine dental care, eyeglasses, and hearing aids
• Custodial long-term care and most assisted-living costs
• Care outside the United States, with narrow exceptions

Those gaps are why almost nobody stops at Parts A and B. The next decision is how to fill them. Our Medicare 101 page summarizes the four parts; the rest of this guide is about the choices that sit on top of them.

The 20% Part B problem: no out-of-pocket maximum

This is the single most important cost rule on Original Medicare, and it is the reason Medigap exists. After you meet the $283 Part B deductible, Medicare pays 80% of the approved amount for most outpatient services. You pay 20%. There is no annual cap on that 20% under Original Medicare alone.

On employer insurance or a Medicare Advantage plan, a bad year eventually hits an out-of-pocket maximum and the plan pays the rest. Original Medicare does not work that way. Chemotherapy, radiation, dialysis, frequent specialist visits, outpatient surgery, and high-cost Part B drugs given in a clinic can each generate a 20% share. A $50,000 run of approved Part B charges is $10,000 of your money. A $200,000 run is $40,000. The percentage never stops.

Part A has its own exposure: the $1,736 deductible, daily coinsurance after day 60, and $217 a day in a skilled nursing facility after day 20. Those amounts are high, but they are at least scheduled. The Part B coinsurance is open-ended. If you keep Original Medicare, you either accept that risk or you buy a Medigap plan that pays most or all of it. If you join Medicare Advantage, the plan must include a yearly in-network out-of-pocket maximum. That cap is the structural trade for using a network.

Two paths after Original Medicare

You cannot usefully combine them. Federal rules do not allow a Medigap policy and a Medicare Advantage plan at the same time. You pick a path, and the path you pick at 65 is easier to keep than to reverse. The honest comparison is in our Medicare Advantage vs Medigap guide; the short version is below.

Path 1: Original Medicare + Medigap + Part D

You keep Original Medicare as your primary coverage. A Medicare Supplement (Medigap) policy pays your share of Medicare-approved costs, according to the plan letter you buy. You add a standalone Part D plan for prescriptions. You can see any doctor or hospital in the country that accepts Medicare. There is no network and, for most care, no referral and little prior authorization.

The cost profile is a higher, predictable monthly premium: Part B, plus the Medigap premium, plus the Part D premium. In a healthy year you may feel you paid for insurance you did not use. In a year with surgery or cancer treatment, your extra medical bills under a comprehensive letter such as Plan G can be limited to the Part B deductible ($283 in 2026). That is the point of the path. Medigap premiums vary by age, zip code, tobacco use, household discounts, and the letter you choose. They are not a single national price, and they are not something this page can quote honestly as a range that fits every Alabama county.

Path 2: Medicare Advantage (Part C)

A Medicare Advantage plan is a private plan that delivers your Part A and B benefits. Most plans include Part D and some dental, vision, or hearing extras. Many charge no premium beyond Part B. You use the plan's provider network, and you pay copays or coinsurance as you go, up to the plan's annual out-of-pocket maximum. Referrals and prior authorization are common for imaging, procedures, and post-hospital care.

The cost profile is pay-as-you-go. Healthy months are cheap. A heavy-use year can approach the plan's maximum, which is often several thousand dollars. Networks are local. If you split time between states, winter in Florida, or want a second opinion at a medical center far from home, out-of-network rules become the whole decision. Extras are real, but they are not a substitute for checking whether your cardiologist, oncologist, and hospital are in-network next January.

Tradeoffs that actually matter

Question	Medigap + Part D	Medicare Advantage
Monthly cost	Higher fixed premiums	Often little or nothing beyond Part B
When you use care	Very little after small deductibles	Copays and coinsurance up to a yearly max
Doctors and hospitals	Any provider that accepts Medicare	Plan network; out-of-network costs more or is not covered
Referrals and prior auth	Rare on Original Medicare	Common
Travel and snowbirds	Works nationwide wherever Medicare is accepted	Built around a local service area
Drugs	Separate Part D plan you can change each fall	Usually bundled; drug coverage moves if you change plans
Dental, vision, hearing	Not included; buy separately if you want them	Often included at some level
Switching later	Easy to move to Advantage each fall	Easy to leave the plan; Medigap afterward may require underwriting

Neither path is universally better. People who travel, see specialists often, or want a known worst-case number tend to prefer Medigap. People who want a low premium, whose doctors are in a strong local network, and who can absorb the plan's maximum in a bad year often prefer Advantage. The extras on Advantage ads are the last thing to weigh, not the first.

How Medigap standardization works

In most states, including Alabama, Medigap plans are standardized by letter. A Plan G from one company has the same basic benefits as a Plan G from another. Plan N is the same idea with a different, also standardized, benefit design. You are not shopping for a different set of hospital benefits when you compare two Plan G policies. You are shopping the premium, the company's service, and any household discount.

That rule is why letter rankings that name a carrier as "the best Plan G" miss the point. The benefits are the same. The price is not. Rate structures also differ: some companies charge by age (attained-age), some use community rates, and some use issue-age rates. Two policies that look similar at 65 can diverge at 75.

The window that protects you is short. Your Medigap open enrollment period starts the first day of the month you are 65 or older and enrolled in Part B, and it lasts six months. During that window, companies must sell you a Medigap plan at their best available rate for your age and location. They cannot refuse you or charge more because of health history. After that window, Alabama has no birthday rule and no annual guaranteed-issue right for everyday shopping. Carriers can ask health questions, add a surcharge, or decline the application. A few federal guaranteed-issue situations still apply, such as certain lost employer or Advantage coverage, but they are narrow.

If you first join a Medicare Advantage plan when you become eligible for Medicare, you generally have a 12-month trial right to return to Original Medicare and buy a Medigap plan with protections. After that first year, switching back is the hard direction. That is why the first decision deserves more than a commercial about gym memberships. Details on current letters we discuss most often are on Plan G, Plan N, and High-Deductible Plan G. Plan F is closed to people who became newly eligible for Medicare on or after January 1, 2020.

Part D: why drug coverage is not optional

Part D pays for prescription drugs you pick up at a pharmacy or receive by mail. You get it two ways: a standalone prescription drug plan next to Original Medicare and Medigap, or drug coverage built into a Medicare Advantage plan. Either way, private companies sell the plans under federal rules. Each plan has its own formulary (covered drug list), tiers, pharmacy network, and prior-authorization rules.

Skipping Part D because you "don't take anything" is one of the expensive mistakes this guide exists to prevent. If you go 63 or more consecutive days without Part D or other creditable drug coverage after your initial enrollment window, Medicare can add a late-enrollment penalty. The penalty is 1% of the national base beneficiary premium for every full month you went without coverage. For 2026 that base premium is $38.99, so each uncovered month adds about $0.39 to your monthly Part D premium, for as long as you have Part D. Five years late is a 60% surcharge on that base, added every month, and the dollar amount can rise when the base premium rises. Medicare explains the rule at Medicare.gov's penalty page.

Creditable coverage means drug coverage that is expected to pay, on average, at least as well as Medicare's standard Part D benefit. Many employer and retiree plans qualify; you should get a creditable-coverage notice each year. COBRA sometimes includes creditable drugs and sometimes does not. Do not assume. A letter from the plan beats a guess.

The other 2026 rule people have heard in pieces is the annual out-of-pocket cap on covered Part D drugs. The Inflation Reduction Act created a hard cap. In 2025 that cap was $2,000. For 2026, the cap is $2,100 on covered Part D drugs. Once your out-of-pocket spending on those covered drugs reaches $2,100, you pay $0 for covered Part D drugs the rest of the calendar year. The old "donut hole" coverage gap is gone. The cap does not erase the need to compare plans: a drug that is not on the formulary, or that needs a prior authorization you never get, may not count the way you expect. No plan may charge a deductible above $615 in 2026, and many charge less. See Medicare.gov on Part D costs and our Part D guide.

This page does not rank carriers or name a "best" drug plan. Formularies change every January. The right plan is the one that covers your exact drugs, at your pharmacy, at the lowest total annual cost, this year.

Enrollment windows people mix up

Medicare uses several calendars that share similar names. Mixing them up is how people miss a penalty or wait until January for a change that had to happen by December 7. Official dates are on Medicare.gov's enrollment page.

Initial Enrollment Period (IEP)

Your IEP is seven months long: the three months before your 65th birthday month, the birthday month, and the three months after. This is when you first sign up for Part A and Part B if you are not enrolled automatically. Enroll in the three months before your birthday month if you want coverage to start the month you turn 65. Enroll later in the window and coverage can start after your birthday, which leaves a gap. The IEP is also when most people pick Medigap plus Part D or a Medicare Advantage plan. If you already receive Social Security, Parts A and B are usually automatic. You still have to choose the path that sits on top.

Annual Enrollment Period (AEP)

AEP runs October 15 through December 7 every year. Changes take effect January 1. During AEP you can switch Medicare Advantage plans, move from Advantage to Original Medicare or the reverse, and join, drop, or change a Part D plan. It is the one guaranteed yearly window to fix coverage that no longer fits. Plans reset premiums, drug lists, and networks every January, so "I like my plan" is a statement about this year, not automatically about next year. AEP is not the Medigap shopping season. You can apply for Medigap any day of the year; the constraint is underwriting, not the fall calendar. See the AEP guide.

Medicare Advantage Open Enrollment Period (OEP)

OEP runs January 1 through March 31. It is only for people who are already in a Medicare Advantage plan on January 1. You get one switch: to a different Advantage plan, or back to Original Medicare with the option to add a standalone Part D plan. You cannot use OEP to hop between Medigap policies, and you cannot use it if you are in Original Medicare and simply changed your mind in February. Think of OEP as a correction window after AEP, not a second AEP for everyone.

Special Enrollment Periods

Special Enrollment Periods (SEPs) open when something specific happens: you leave a job with qualifying group coverage, you move out of your plan's service area, your plan leaves Medicare or your county, you qualify for extra help with drug costs, or another event Medicare recognizes. The most common SEP is the one after employer coverage ends. If you delayed Part B because you had coverage from a current employer with 20 or more employees, you generally have eight months after that job (or the group coverage) ends to enroll in Part B without the late penalty. Drug coverage has its own creditable-coverage rules and timelines. Do not treat COBRA, retiree coverage, or a spouse's plan as automatic permission to wait; each has a different test. Our working-past-65 guide covers the employer-size rule.

If you missed IEP and do not qualify for a SEP, the General Enrollment Period (January 1 through March 31) is the catch-up window for Part A and Part B. Coverage generally starts the month after you enroll. Late-enrollment penalties can still apply. That is a different January-to-March window from OEP, which only helps people already on Advantage.

Common expensive mistakes

These are the errors we see most often when someone is turning 65 or re-shopping. None of them require a "bad" plan. They require a skipped question.

• Delaying Part B without qualifying employer coverage. The penalty is 10% of the standard Part B premium for each full 12-month period you were eligible but did not enroll, and it lasts as long as you have Part B. At $202.90 in 2026, one full year late is about $20.29 extra every month, for life. COBRA is not current employer coverage for this purpose. Retiree insurance often is not either. If the employer has fewer than 20 employees, Medicare is usually supposed to be primary at 65 even if you are still working.
• Skipping Part D with no creditable drug coverage. The 1%-per-month penalty is smaller than Part B's, but it is permanent and it stacks. Worse, if you are prescribed an expensive specialty drug in June, you generally wait until the next enrollment window to get a plan.
• Choosing Medicare Advantage for extras without checking doctors and drugs. Dental, vision, and a fitness benefit are easy to advertise. They do not help if your oncologist is out of network or your anticoagulant sits on a high tier with prior authorization. Verify the providers and the formulary first. Treat extras as a tie-breaker.
• Picking by premium alone. A $0-premium Advantage plan can cost more than Medigap in a year that includes surgery. A cheap Part D plan that misses one drug can cost more than a higher-premium plan that covers it. Compare total annual cost and the worst-case number, not the monthly line.
• Missing the six-month Medigap window. People try Advantage while healthy, then want Medigap after a diagnosis and discover Alabama carriers can underwrite. The trial right in the first 12 months is the main safety valve. After that, the door can close.
• Never reviewing coverage again. AEP exists because plans change. Read the Annual Notice of Change in September. Recheck doctors, drugs, and pharmacy networks before December 7. Our post on Medicare mistakes Alabama seniors should avoid walks through local examples.

IRMAA: when income raises your Medicare premiums

IRMAA is the Income-Related Monthly Adjustment Amount. If your modified adjusted gross income (MAGI) from two years ago is above a threshold, Medicare adds a surcharge to Part B and to Part D. MAGI is adjusted gross income plus tax-exempt interest. For 2026 premiums, Social Security looks at your 2024 tax return. The surcharge is per person, so both spouses can pay it.

For 2026, the standard Part B premium of $202.90 applies at MAGI of $109,000 or less for a single filer, or $218,000 or less for a couple filing jointly. Above those lines the Part B premium steps up, and a separate Part D surcharge is added on top of whatever your drug plan charges. The first step is a Part B total of $284.10 and a Part D surcharge of $14.50 per month. Higher steps go up from there, to $689.90 for Part B and a $91.00 Part D surcharge at the top bracket. The full 2026 table is on our cost and IRMAA calculators page, using the same CMS figures published for the year.

IRMAA applies whether you are on Original Medicare or Medicare Advantage, because you still have Part B, and it applies whether your drugs come from a standalone Part D plan or an Advantage plan. If your income dropped because of a life-changing event such as retirement, divorce, or the death of a spouse, you can ask Social Security to use more recent income by filing Form SSA-44. A one-time capital gain, by itself, usually does not qualify. Background is in What is IRMAA?.

How to prepare for a Medicare review

A useful review is a comparison against your real life, not a brochure. Whether you do it yourself at Medicare.gov, with Alabama SHIP, or with a licensed agent, bring the same five things:

1. Doctors and hospitals. The clinicians you will not give up, plus the hospital you would use in an emergency. Include specialists, not just a primary-care name.
2. Prescriptions. Every drug with exact name, dose, and how often you fill it, including the expensive one you only take sometimes. Over-the-counter vitamins do not belong here; branded and generic prescriptions do.
3. Zip code, and any other zip codes you live in. Advantage plans are county-based. If you spend winters elsewhere, say so. Medigap works nationwide, but Part D pharmacy networks do not.
4. Travel and second opinions. How often you leave the area, and whether you want the option of a medical center that is not local.
5. Budget, including the worst month you could handle. What you can pay every month in premiums, and what you could pay if you hit an Advantage maximum or a hospital deductible. Those are different numbers.

If you already have Medicare, add this year's plan name and the Annual Notice of Change if it has arrived. If you are turning 65, add your employer-coverage facts: company size, whether you or a spouse is still working, and any creditable-coverage letter for drugs. The enrollment checklist is the step-by-step timeline. If you live in our region, the Alabama Medicare guide covers how these choices look by county.

Dalton Insurance Agency will run both paths against that list and show you the costs. You keep the decision. If you never call, you can still use the same list at Medicare.gov or with SHIP at 1-800-243-5463 in Alabama.

Gaps that remain on both paths

No Medicare path is a complete financial plan. Original Medicare, Medigap, and Medicare Advantage all leave some costs on the table. Skilled nursing coverage still ends after 100 days in a benefit period. Custodial long-term care is not a Medicare benefit. Routine dental, vision, and hearing are excluded from Original Medicare; Advantage extras help some years and disappoint in others, depending on annual maximums and waiting periods. Travel abroad is mostly uncovered. Those are reasons to know what you are buying, not reasons to panic-buy every rider in a seminar.

If you want help applying this guide to your doctors, prescriptions, and zip code, book a free consult or call (334) 489-3624. If you want to keep reading, the path comparison and Part D page are the next two stops.

About this guide

This content is for education. It is not personalized insurance, tax, or legal advice, and it is not a complete statement of Medicare benefits. Dalton Insurance Agency is not affiliated with or endorsed by the federal Medicare program, CMS, or the Social Security Administration. Plan availability, premiums, deductibles, networks, and drug lists vary by location and change every year. Official figures on this page for 2026 follow CMS and Medicare.gov publications, including the 2026 Parts A and B premiums and deductibles fact sheet. If a plan's Evidence of Coverage disagrees with anything here, the plan document controls. See our Medicare disclaimer for how to reach 1-800-MEDICARE and Alabama SHIP.