Medicare.gov explained: what the site does and how to use it

The site serves several distinct purposes, and understanding which tool to use for which task saves a lot of time. Broadly, it handles four things: explaining how Medicare works, walking you through enrollment, helping you compare and choose plans, and letting enrolled beneficiaries manage their coverage.

Because the site is authoritative, numbers displayed there reflect official program values. For reference, in 2026 the standard Part B premium is $202.90 per month and the annual Part B deductible is $283, both published by CMS. The Part A inpatient deductible is $1,736 per benefit period (not per calendar year, an important distinction). When you read these figures on Medicare.gov, the year label tells you which program year applies.

In short: Medicare.gov is CMS's own tool, which makes it the authoritative source for enrollment, plan comparison, and cost data.

Enrollment is one of the most visited sections of Medicare.gov, and for good reason. Missing enrollment windows carries permanent financial consequences.

Initial enrollment period (IEP). The IEP is seven months long: the three months before your 65th birthday month, your birthday month itself, and the three months after. Medicare.gov walks you through this window and explains what happens if you enroll early or late within that period.

Special enrollment periods (SEPs). If you have active employer coverage through a group health plan at a company with 20 or more employees, you can delay Part B without penalty and use an eight-month SEP when employment or employer coverage ends, whichever comes first. Medicare.gov explains the SEP rules, and it is worth reading them carefully: COBRA and retiree coverage never count as active employer coverage for SEP or late-penalty purposes, so signing up for COBRA after leaving a job does not restart or extend your eight-month window.

Annual enrollment period (AEP) and open enrollment. AEP runs October 15 to December 7 each year. During this window you can join, switch, or drop a Medicare Advantage (Part C) or Part D prescription drug plan. If you are already in a Medicare Advantage plan and want to switch, there is also a Medicare Advantage Open Enrollment Period (OEP) from January 1 to March 31. Medicare.gov provides a plan finder tool that reflects the plans available for the coming year during AEP.

Penalties for late enrollment. The site explains both late-enrollment penalties clearly. The Part B penalty adds 10% to your premium for each full 12-month period you went without Part B and without qualifying coverage, and that increase is permanent. The Part D penalty works differently: it adds 1% of the national base beneficiary premium (which is $38.99 in 2026) for each full month you went without creditable drug coverage after your IEP ended. Going 63 or more consecutive days without creditable coverage after your IEP triggers the Part D penalty. Both penalties follow you for as long as you have Medicare.

In short: Enrollment windows have hard edges and permanent financial consequences; Medicare.gov lays out every deadline and penalty in one place.

The plan finder is the most-used feature on Medicare.gov. It lets you compare Medicare Advantage plans and Part D drug plans available in your zip code for the current plan year.

Here is what the tool actually shows you:

• Monthly premiums. Many areas have plans with $0 premiums, though Part B still applies. Plan availability and premium amounts vary by location and change annually.
• Out-of-pocket limits. In 2026, the federal in-network MOOP (maximum out-of-pocket) cap for Medicare Advantage is $9,250; plans may set their limits lower. According to KFF, the 2026 enrollment-weighted average in-network MOOP across Medicare Advantage plans is $5,421, meaning most enrolled beneficiaries are in plans with limits below the federal ceiling. The combined in-network plus out-of-network MOOP cap in 2026 is $13,900.
• Drug formularies. If you enter your specific medications, the plan finder cross-references them against each plan's formulary (list of covered drugs) so you can see which plans cover what you take and at what tier cost.
• Star ratings. CMS rates Medicare Advantage and Part D plans on a scale of one to five stars based on quality and performance measures. The plan finder displays these ratings, which can be a useful starting point for comparing plans in your area.
• Network and benefits. The finder shows whether your current doctors are in a plan's network and lists supplemental benefits such as dental, vision, or hearing coverage. These benefits vary significantly by plan and are set at the plan level, so the amounts and details render from CMS plan data rather than fixed values.

To get the most accurate comparison, enter your zip code, your current medications and dosages, and the names of doctors or facilities you want to keep. The tool then ranks plans by estimated annual drug cost, which gives you a more complete picture than premium alone.

In short: The plan finder is a powerful comparison tool, but it works best when you enter your specific medications and providers.

Once you are enrolled, Medicare.gov shifts from an enrollment tool to a coverage management tool. Beneficiaries who create a Medicare.gov account can access their Medicare Summary Notice (MSN), check claims, and see what Medicare has paid on their behalf.

A few things the site helps you understand once you are covered:

Part A cost structure. Hospital stays under Part A are free for days 1 to 60 within a benefit period, then cost $434 per day for days 61 to 90 in 2026. Beyond 90 days, you draw on lifetime reserve days at $868 per day, and there are only 60 of those over a lifetime. Skilled nursing facility (SNF) care is fully covered for days 1 to 20, then costs $217 per day for days 21 to 100; after day 100 you pay all costs. Importantly, SNF coverage requires a three-day formal inpatient hospital admission, and observation status, which is billed under Part B, does not count toward that three-day requirement.

Part B cost structure. After the annual Part B deductible of $283, Medicare pays 80% of the approved amount and you pay 20%, with no annual cap on that 20% in Original Medicare. Non-participating providers can charge up to 15% above the Medicare-approved amount; some states ban these excess charges entirely.

Part D cost structure. In 2026, out-of-pocket spending on covered Part D drugs is capped at $2,100 for the year, a change brought about by the Inflation Reduction Act that eliminated the coverage gap (sometimes called the donut hole). No Part D plan may set a deductible above $615 in 2026. After you hit the $2,100 cap, covered drugs cost $0 for the rest of the year.

IRMAA. If your income is above a certain threshold, you pay more for Part B and Part D through the Income-Related Monthly Adjustment Amount (IRMAA). In 2026, IRMAA begins at $109,000 for single filers and $218,000 for joint filers, using a two-year lookback (so 2026 premiums are based on 2024 income). The structure is a cliff: one dollar over a threshold moves you to the full next tier. Higher income brackets pay progressively more through a series of tiers above these entry thresholds. Medicare.gov links to SSA resources if you believe your IRMAA determination is based on outdated income; you can request reconsideration within 60 days of receiving the notice.

In short: Medicare.gov gives enrolled beneficiaries a clear view of their claims, costs, and coverage details through a personalized account.

Medicare.gov also covers programs that lower costs for people with limited income. These include:

Extra Help (Low Income Subsidy, LIS). Extra Help reduces or eliminates Part D premiums, deductibles, and copays for people who qualify based on income and resources. Eligibility limits are indexed annually and vary by state, so the site directs you to SSA.gov for the current-year figures.

Medicare Savings Programs (MSPs). MSPs are state Medicaid programs that help pay Medicare premiums and, in some cases, cost-sharing. Asset limits and income thresholds vary by state and change frequently; Medicare.gov links to state resources and Social Security for current eligibility information.

Special Needs Plans (SNPs). SNPs are a category of Medicare Advantage plans designed for people with specific conditions, dual eligibility for Medicare and Medicaid, or institutional needs. Qualifying criteria are program-defined and vary by plan type; Medicare.gov's plan finder lets you filter for SNPs.

In short: Medicare.gov connects you to cost-reduction programs, but income and asset limits vary by state and year, so always verify current eligibility through the linked SSA or state resources.

The homepage can feel busy if you do not know what you are looking for. Here is a practical map:

Creating a Medicare.gov account (separate from Social Security) lets you see your personalized cost estimates, track claims, and manage your information. You will need your Medicare number, available on your red-white-and-blue Medicare card, to set up the account.

For Medigap (Medicare Supplement Insurance), the site explains plan types but does not sell or compare specific policies, because Medigap is regulated at the state level and sold through private insurers. It does walk through the one federally guaranteed enrollment window: a six-month period starting the month you are both 65 and enrolled in Part B. Outside that window, insurers in most states can use medical underwriting, though some states provide additional protections. States fall into broad categories: some offer year-round guaranteed issue (New York and Connecticut, for example), others allow plan-to-plan switching (Washington), and a growing group uses birthday-rule protections, including California, Oregon, and others, with varying window lengths.

In short: Knowing the right URL within Medicare.gov gets you to the tool you need without navigating through unrelated sections.

Medicare.gov is comprehensive, but it has limits. It cannot tell you what a specific plan will cost you personally in the coming year beyond the estimates in the plan finder. It cannot advise you on whether to choose Original Medicare with a Medigap policy or a Medicare Advantage plan, because that decision depends on your health situation, finances, provider preferences, and geography.

It also cannot account for state-specific Medigap protections in detail, nuances in how your employer's plan coordinates with Medicare, or whether a particular specialist in your area participates in a given network. For those questions, speaking with a licensed insurance agent is the practical next step. To find out more about coverage and get help comparing your specific options, please contact us to discuss plan options.

In short: Medicare.gov gives you the framework and data; a licensed agent helps you apply that information to your specific situation.