āTraditional Medicare,ā also called Original Medicare, is the federal health insurance most people picture when they think of Medicare. It is made up of two parts and lets you see nearly any doctor in the country, but it has some notable gaps that lead many people to add other coverage. This guide explains what Original Medicare is, what it covers, what it costs, and how it compares to the private alternative. Coverage and costs change, so verify current details before relying on them.
The Short Answer
Original Medicare is the government-run program made up of Part A (hospital insurance) and Part B (medical insurance). It lets you see any provider nationwide that accepts Medicare, with no networks and generally no referrals. You typically pay 20% coinsurance for Part B services, and there is no annual out-of-pocket cap, which is why many people add a drug plan and a Medigap policy.
Part A: Hospital Insurance
Part A covers inpatient hospital care, skilled nursing facility care after a qualifying hospital stay, hospice, and some home health care. It is premium-free for most people, those who or whose spouse paid Medicare taxes for about ten years. Part A has an inpatient deductible per benefit period, about $1,736 in 2026, and coinsurance for long hospital stays.
Part B: Medical Insurance
Part B covers doctor visits, outpatient care, preventive services, lab tests, durable medical equipment, mental health care, and ambulance services. It has a monthly premium, about $202.90 in 2026 for most people, with higher-income beneficiaries paying more, and an annual deductible of about $283. After the deductible, you generally pay 20% of the Medicare-approved amount for covered services.
The Key Features and Gaps
Two features define Original Medicare. First, you can see any provider nationwide that accepts Medicare, with no networks and generally no referrals, which is valuable for people who travel or want provider freedom. Second, and importantly, there is no yearly out-of-pocket maximum, so that 20% coinsurance has no ceiling. Original Medicare also does not include prescription drug coverage, and it generally does not cover routine dental, vision, hearing, or long-term custodial care.
What People Add to Fill the Gaps
Because of those gaps, most people add coverage. A Part D plan adds prescription drug coverage. A Medigap, or Medicare Supplement, policy helps pay your 20% coinsurance and deductibles, and Medigap plans are standardized by letter so you can compare them. Together, Original Medicare plus Part D plus a Medigap policy gives predictable costs and provider freedom, at the cost of higher monthly premiums.
How It Compares to Medicare Advantage
The main alternative is Medicare Advantage, a private plan that bundles Parts A and B and usually drug coverage, often with extra benefits like dental or vision, and always with an annual out-of-pocket cap. The trade-off is that Advantage plans use networks and prior authorization. You choose Original Medicare or Medicare Advantage, and the right choice depends on whether you value provider freedom and predictable supplemental costs, or lower premiums with an out-of-pocket cap. For a fuller cost breakdown, see our guide to how much Medicare costs.
How to Enroll
Most people enroll in Original Medicare around their 65th birthday, during their Initial Enrollment Period, and some are automatically enrolled if they already receive Social Security. Enroll through the Social Security Administration or Medicare.gov, and be mindful of enrollment deadlines to avoid lifelong late penalties on Part B.
Enrolling and Avoiding Late Penalties
Timing your Medicare enrollment matters. Missing your window can cost you extra for life.
Most people enroll around age 65, during their initial enrollment period. If you delay Part B or Part D without other qualifying coverage, you can face permanent late penalties. If you are still working with employer coverage, ask how it affects your timing. Enrolling on time avoids these penalties.
Yearly Costs to Plan For
Original Medicare has predictable costs you can plan around. Knowing them helps you budget.
Part B has a monthly premium and an annual deductible. Part A is premium-free for most people but has hospital deductibles. There is no yearly out-of-pocket cap in Original Medicare alone, which is why many people add a Medigap policy. Review these costs each year, since amounts change.
Traditional Medicare FAQs
What is the difference between Original Medicare and Medicare Advantage?
Original Medicare is government-run, lets you see any provider, and has no out-of-pocket cap. Medicare Advantage is a private bundled plan with networks and an out-of-pocket cap.
Is Part A free?
It is usually premium-free with about ten years of Medicare-taxed work. Part B has a monthly premium.
Does Original Medicare cover prescriptions?
No. You add a separate Part D drug plan.
Is there a cap on what I pay?
No. Original Medicare has no out-of-pocket maximum, which is a key reason to consider Medigap.
Can I see any doctor?
Yes, any provider nationwide that accepts Medicare, with generally no referrals.
About $202.90 a month for most people, more for higher earners.
Do I need referrals?
Generally no under Original Medicare.
Can I switch between Original Medicare and Medicare Advantage?
Yes, generally during certain enrollment periods each year. Switching from Advantage back to Original Medicare and adding Medigap may involve medical underwriting depending on timing, so check the rules.
Does Original Medicare cover me when I travel in the US?
Yes. Because it is not network-based, Original Medicare covers you with any provider nationwide that accepts Medicare, which is convenient for travel.
