Medicare FAQ: The Questions Every Adult Child Actually Asks

Helping a parent with Medicare means walking into a system designed by actuaries and written in bureaucratic shorthand. Most questions do not have simple answers -- they have "it depends" answers that hinge on your parent's age, income, employer situation, health history, and state of residence.

This FAQ collects the questions adult children ask most often, with direct answers that cut past the marketing language.

Enrollment Basics

When does my parent need to sign up for Medicare?

The primary enrollment window is the Initial Enrollment Period (IEP): a 7-month window that begins 3 months before your parent's 65th birthday month, includes the birthday month, and ends 3 months after. If they miss this window without a qualifying reason (like active employer coverage), they face lifetime late enrollment penalties.

The one exception: if your parent is still working at a company with 20 or more employees and covered by that employer's group health plan, they can delay Medicare Part B without penalty. They then have a Special Enrollment Period -- up to 8 months after they lose that coverage or retire -- to sign up without penalty.

What happens if my parent misses the enrollment window?

If they miss the IEP and do not qualify for a Special Enrollment Period, they must wait for the General Enrollment Period (January 1 through March 31 each year), with coverage starting the following July 1. A late enrollment penalty applies to Part B for every 12-month period they delayed, and this penalty is permanent -- it gets added to their premium for life.

Does my parent have to sign up for Medicare if they have other insurance?

It depends on the employer size. For employers with 20 or more employees, your parent's employer plan is primary and they can safely delay Part B. For small employers (under 20 employees), Medicare is legally the primary payer at age 65 -- the employer plan becomes secondary. If they do not enroll in Part B when Medicare becomes primary, the employer plan may refuse to pay what Medicare should have paid, leaving your parent with significant unpaid bills.

Can I enroll in Medicare on my parent's behalf?

You can help them complete the application at SSA.gov, but your parent must authorize you to act on their behalf for ongoing Medicare matters. To call 1-800-MEDICARE, view claims, or file appeals for them, you need to file Form CMS-1696 (Appointment of Representative). A general Power of Attorney does not automatically grant this access -- Medicare follows federal privacy rules that often supersede state POA documents.

Plan Choices

What is the difference between Original Medicare and Medicare Advantage?

Original Medicare (Parts A and B) is the federal government's fee-for-service program. Your parent can see any doctor or hospital in the country that accepts Medicare -- roughly 93% of all non-pediatric providers. There are no networks and no referrals required, but there is also no cap on out-of-pocket costs.

Medicare Advantage (Part C) is private insurance that replaces Original Medicare. These plans often have $0 monthly premiums and include dental, vision, and hearing benefits that Original Medicare does not cover. The trade-off is managed care: networks, referrals, prior authorizations for expensive procedures, and an annual out-of-pocket maximum that can reach $9,350 in 2026.

The simplest way to think about it: Medicare Advantage is cheaper when your parent is healthy. Original Medicare is cheaper -- and far less administratively difficult -- when your parent is seriously ill.

My parent's broker keeps pushing Medicare Advantage. Should we trust that recommendation?

Probably not without scrutiny. Insurance brokers earn significantly higher commissions for Medicare Advantage enrollments than for Part D or Medigap plans. A captive agent (one who works for a single insurer) can only offer that company's plans. Even independent brokers may be steered by volume bonuses from preferred carriers. This does not mean every broker is dishonest, but it means the "free" advice is not neutral. For unbiased counseling, contact your state's SHIP program (State Health Insurance Assistance Program) -- they are federally funded and do not earn commissions.

What is Medigap and does my parent need it?

Medigap (also called Medicare Supplement) is private insurance that wraps around Original Medicare and pays the costs Medicare does not -- primarily the 20% coinsurance that would otherwise be your parent's responsibility. Without Medigap or Medicare Advantage, there is no cap on what your parent could owe in a bad health year.

If your parent chooses Original Medicare, they almost certainly need a Medigap plan. Plan G is the most comprehensive option for new enrollees (those who became eligible after January 1, 2020): after paying the Part B annual deductible ($257 in 2025), the plan pays 100% of all other Medicare-covered costs.

Can my parent switch from Medicare Advantage back to Original Medicare later?

Yes, but it is harder than switching in. During the Annual Open Enrollment Period (October 15 through December 7), your parent can return to Original Medicare. The problem is buying a Medigap plan after the fact: in most states, Medigap insurers can use medical underwriting for anyone outside their initial 6-month enrollment window, meaning they can deny coverage or charge higher premiums based on health conditions. If your parent develops a chronic illness while on Medicare Advantage at age 65 and tries to switch at age 72, they may find themselves unable to get a Medigap policy.

The exceptions: some states (New York, Connecticut, Massachusetts, Maine) allow Medigap shopping year-round without underwriting. Several others (California, Oregon, Idaho, Illinois, Nevada, Louisiana, Kentucky, Maryland) have "birthday rules" allowing annual switches to equal-or-lesser plans.

Part D and Drug Coverage

Does my parent need Part D even if they do not take any medications?

Almost always yes. The penalty for skipping Part D is permanent: 1% of the national base beneficiary premium for every month without creditable drug coverage. A 3.5-year gap results in a 43% penalty tacked onto the monthly premium for life. At current rates, that is roughly $4,000 over 20 years -- far more than the cost of a low-premium Part D plan. Even a plan with a $10 monthly premium and no drugs used is cheaper than the penalty.

How do we pick the right Part D plan?

Do not pick by premium alone -- the formulary (the list of covered drugs) determines actual cost. Use the Medicare Plan Finder at Medicare.gov/plan-compare. Enter your parent's exact medications with precise dosages. Enter their preferred pharmacy. Then sort results by "Lowest Drug + Premium Cost" (Total Cost of Care), not by premium price.

Plans change their formularies every year. The plan that was optimal in 2025 may not be in 2026. Review your parent's Part D plan every year during Open Enrollment.

What changed with Part D in 2025 and 2026?

The Inflation Reduction Act significantly restructured Part D. Starting in 2025, there is a $2,000 annual out-of-pocket cap on covered Part D drugs (rising to $2,100 in 2026). The infamous "donut hole" coverage gap is effectively gone. A new Medicare Prescription Payment Plan (M3P) option lets beneficiaries spread costs into monthly installments rather than paying large lump sums in January. These changes are especially significant for parents on expensive specialty medications.

Costs and Assistance

How much does Medicare cost per month?

The baseline is the Part B premium: $202.90 per month in 2026 for most beneficiaries. Higher earners pay more through IRMAA (Income-Related Monthly Adjustment Amount) -- the surcharge is based on income from two years prior. Part A is free for those with at least 40 quarters of Medicare-covered work history.

Beyond the Part B premium, costs depend on the path chosen:

• Original Medicare + Plan G + Part D: roughly $380 to $500/month in combined premiums, with predictable out-of-pocket costs.
• Medicare Advantage: Part B premium plus usually $0 for the MA plan itself, but variable out-of-pocket costs depending on utilization.

My parent cannot afford Medicare premiums. Is there help?

Yes. Medicare Savings Programs (MSPs) are state-run programs that help low-income beneficiaries pay Medicare premiums, deductibles, and coinsurance:

• QMB (Qualified Medicare Beneficiary): Pays Part A and B premiums, deductibles, and coinsurance. Providers cannot legally bill QMB patients for Medicare-covered services.
• SLMB (Specified Low-Income Medicare Beneficiary): Pays the Part B premium only.

Income limits are roughly $1,325/month (single) for QMB and $1,585/month (single) for SLMB in 2026. Asset tests exist in most states (usually around $9,000 in savings), but New York, Connecticut, Alabama, and Arizona have eliminated asset tests entirely.

For prescription drug costs, Extra Help (also called the Low Income Subsidy) is a federal program worth approximately $5,900 per year -- it caps drug costs at $12.65 per prescription in 2026.

Claims, Disputes, and Coverage Issues

Medicare Advantage denied my parent's claim. What do we do?

File an appeal. Medicare Advantage plans must follow federal appeals procedures, and success rates are high -- over 80% of denied claims are overturned at higher levels of review. The process starts with a Redetermination Request to the plan, which must be submitted within 60 days of the denial. If the plan upholds the denial, you escalate to a Qualified Independent Contractor, then to the Medicare Appeals Council, and ultimately to federal district court.

Do not accept the first denial as final. Document everything and keep all correspondence.

How do I verify what Medicare will and will not cover before a procedure?

For Medicare Advantage, request a prior authorization decision in writing before any non-emergency procedure. For Original Medicare, check Medicare.gov's coverage database -- it lists what is and is not covered. For expensive gray-area situations (like home health care or durable medical equipment), request an Advance Beneficiary Notice (ABN) from the provider before the service. An ABN protects your parent's appeal rights if Medicare denies payment.

What to Do Next

Medicare is a system where the decisions made at 65 often cannot be undone at 75. The stakes are high enough to deserve a structured approach rather than relying on a broker's recommendation or a neighbor's experience.

Our Medicare Enrollment Guide walks adult children through each of these decisions in depth -- from the initial enrollment timeline to the annual plan review process -- with worksheets, comparison frameworks, and step-by-step instructions. If you are managing this for a parent and want to be confident you are not leaving money on the table or making an irreversible mistake, it is the place to start.