Medicare Part C, explained

The short version: Part C and Medicare Advantage are the same thing, a private plan that delivers your Part A and Part B benefits, usually bundled with Part D and extras.

Part C is the private alternative to Original Medicare. Instead of getting Part A and Part B directly from the federal government, you choose a private plan approved by Medicare that provides those same benefits, and typically adds prescription drug coverage and extras such as dental, vision, or hearing. You still have Medicare the whole time. You are choosing how to receive it.

This is why the lineup goes A, B, and D but rarely mentions C on its own. Part C is the wrapper, not a fifth kind of coverage. When someone says they have a Medicare Advantage plan, they have Part C.

Because a private plan runs Part C, it comes with rules Original Medicare does not have. Most plans use a provider network, so care costs less when you stay in network, and some plans do not cover non-emergency care outside it. Many plans also use prior authorization, where the plan approves certain services before they are covered. For standard requests plans generally decide within 7 calendar days, and expedited requests within 72 hours.

In exchange for those rules, Part C adds something Original Medicare lacks: an annual out-of-pocket maximum. For 2026 the in-network ceiling is $9,250, and many plans set a lower amount. Once you reach your plan limit, the plan pays your covered medical costs for the rest of the year.

In short: Part C trades some freedom of access for a yearly cap on what you can pay and, often, extra benefits.

The choice between Part C and Original Medicare is really a choice between two ways of managing cost and access. Original Medicare offers broad provider access and predictable structure, but its 20% Part B coinsurance has no annual cap unless you add a supplement. Part C caps your yearly spending and often bundles drugs and extras, but ties you to a network and plan rules. Neither is better for everyone.

You also keep paying the Part B premium, which is $202.90 per month in 2026, on top of any premium the plan charges. Because the right fit depends on your doctors, your budget, and your health, please contact us to discuss your options.

You can generally join or change a Part C plan during the fall Annual Enrollment Period, which runs Oct 15 to Dec 7, with coverage starting January 1. There is also a Medicare Advantage Open Enrollment Period from Jan 1 to Mar 31, when someone already in a Part C plan can make one change. Outside those windows, a Special Enrollment Period may apply after certain life events.

The short version: Part C is Medicare Advantage. If a capped worst case and bundled extras appeal to you, it is worth comparing plans before an enrollment window closes.