Plan C and Plan G Are Almost Identical — With One Giant Catch
If you’re comparing Medigap Plan C and Plan G, the short answer is this: they cover almost exactly the same things, but Plan C is no longer available to anyone who became eligible for Medicare on or after January 1, 2020. That one fact changes everything about how you should approach this comparison.
Plan C used to be a popular choice because it covered the Part B deductible, meaning enrollees paid virtually nothing out of pocket for doctor visits. Plan G doesn’t cover that deductible. In 2026, the Part B deductible is $257 per year. That’s the entire gap between these two plans.
So if you became eligible for Medicare before 2020, you might still be able to get Plan C. If you became eligible in 2020 or later, Plan C is off the table entirely. The law that eliminated it (the MACRA Act) was specifically designed to stop people from having “first-dollar coverage” for Part B costs, under the theory that it removed the incentive to avoid unnecessary doctor visits. Whether you agree with that reasoning or not, the rule is the rule.
What Each Plan Actually Covers
Let me break this down in concrete terms. Both Plan C and Plan G cover a substantial list of Medicare cost-sharing gaps. Here’s the direct comparison:
| Benefit | Plan C | Plan G |
|---|---|---|
| Part A deductible ($1,676 per benefit period in 2026) | Yes | Yes |
| Part A hospital coinsurance (days 61-90) | Yes | Yes |
| Part A lifetime reserve days | Yes | Yes |
| Skilled nursing facility coinsurance | Yes | Yes |
| Part B deductible ($257 in 2026) | Yes | No |
| Part B coinsurance (20% after deductible) | Yes | Yes |
| Part B excess charges | No | Yes |
| Foreign travel emergency (up to plan limits) | Yes | Yes |
| Hospice care coinsurance | Yes | Yes |
| First three pints of blood | Yes | Yes |
Did you catch the thing hiding in that table? Plan G actually covers Part B excess charges, and Plan C does not. Excess charges happen when a doctor doesn’t accept Medicare assignment and charges up to 15% more than the Medicare-approved rate. Plan C holders have no protection against those charges. In most states this is a small risk, but in states like New York and Connecticut, excess charges are actually banned, so it’s irrelevant. If you live in a state where doctors routinely don’t accept Medicare assignment, this actually matters to you.
The Price Difference and Whether It Actually Makes Sense
Here’s where things get interesting. Plan C, because it covers that $257 Part B deductible, should theoretically cost more than Plan G. And historically, it often did. But in practice, you might find Plan C premiums that are comparable to or even lower than Plan G in your area, depending on the insurer and how old the policy block is.
If you’re a pre-2020 Medicare enrollee who’s had Plan C for years, your insurer hasn’t been able to sell it to new people. That means the risk pool for Plan C is aging and potentially getting sicker. Insurers sometimes raise premiums on these “closed blocks” faster than on plans they’re actively selling. I’ve seen people hanging onto Plan C out of loyalty or inertia who are paying $30-$50 more per month than a comparable Plan G would cost them, all to have $257 covered annually. That math doesn’t work in their favor.
For someone turning 65 today and shopping for Plan G, typical premiums run $100 to $200 per month depending on your state, the insurer, and whether you’re male or female (yes, sex still affects pricing in many states). A 65-year-old woman in Ohio might find Plan G around $110-$130 per month with a well-rated carrier. A man the same age might pay slightly more due to actuarial tables.
The math on Plan G is simple. You pay your $257 Part B deductible once per year, and after that, you’re essentially fully covered for Medicare-approved services. For most retirees, that predictability is worth more than the actual dollar amount.
The Biggest Misconception People Have About Plan C
I hear this one regularly: “I have Plan C so I don’t need to worry about anything.” That’s not quite right, and it trips people up.
First, Plan C doesn’t cover Part B excess charges, as we covered above. If you see a doctor who bills more than Medicare allows, you’re on the hook for the difference up to 15% of the Medicare-approved amount. Most Plan C holders don’t know this.
Second, some people confuse “Plan C” with “Medicare Part C,” which is Medicare Advantage. They are completely different things. Medicare Advantage is a privatized alternative to original Medicare. Medigap Plan C is a supplement that works alongside original Medicare. If you’re confused about this, you’re in good company. The naming is genuinely terrible, and I’d argue it’s one of the most confusing things about the Medicare system for new enrollees.
Third, and this one stings: some people who became eligible for Medicare after January 1, 2020 have been sold Plan C anyway by agents who either didn’t know the rules or weren’t being straight with them. If someone tried to sell you Plan C and you became eligible after 2020, that should not have happened. You need to look at your policy documentation carefully.
Who Should Care About This Comparison in 2026
Let’s be direct about who this actually applies to.
If you became eligible for Medicare in 2020 or later, you’re shopping for Plan G (or possibly Plan N or Plan D for lower premiums). Plan C is not an option for you. Full stop. You don’t need to spend more mental energy on this comparison.
If you became eligible before 2020 and you’re still on Plan C, here’s what I’d suggest: get a quote for Plan G right now. If you’ve been on Plan C for several years with the same insurer, there’s a decent chance you’re paying more than you need to be. Compare the premium difference to that $257 deductible. If your Plan C premium is more than $21 more per month than a comparable Plan G would cost, you’re losing money.
That said, switching plans isn’t always easy. In most states, you don’t have a guaranteed right to switch from one Medigap plan to another outside of specific windows. If you’ve developed health conditions since you first enrolled, you could face medical underwriting, which means insurers could charge you more or deny you based on your health. That complicates the math significantly. Someone with a serious condition might be better off staying in Plan C even if it’s slightly more expensive, just to avoid the risk of being declined for Plan G.
If you’re in a state with continuous open enrollment protections for Medigap (Connecticut, Maine, Massachusetts, New York, and Washington have various forms of this), you have more flexibility. Switching is less risky there.
Bottom Line
For anyone becoming eligible for Medicare today, Plan G is the right call for most people who want a low-hassle, predictable Medigap experience. You pay your $257 Part B deductible, and you’re done worrying about cost-sharing for the year. If you’re currently on Plan C, run the numbers on your current premium versus what Plan G would cost you, and factor in whether you can qualify medically before making a move. The $257 deductible is not worth overpaying by hundreds of dollars a year.
Frequently Asked Questions
Can I still buy Medigap Plan C in 2026?
Only if you became eligible for Medicare before January 1, 2020. Anyone who turned 65 or qualified for Medicare due to disability on or after that date cannot buy Plan C. This is federal law, not just a carrier decision.
Is Plan G really better than Plan C?
For most people who are eligible for Medicare today, Plan G is the only real option in this comparison since Plan C isn’t available. For pre-2020 enrollees comparing the two, Plan G often wins on price and it adds excess charge coverage that Plan C lacks. The only thing Plan G doesn’t do that Plan C does is cover that $257 annual deductible.
What happens if I switch from Plan C to Plan G?
In most states, switching Medigap plans requires you to go through medical underwriting outside of specific enrollment windows. If you’re in good health, this usually isn’t a problem. But if you’ve developed significant health conditions since you first enrolled, you might be denied coverage or charged higher rates. Check your state’s rules before you do anything.
Why did Plan C get eliminated for new enrollees?
Congress decided that “first-dollar coverage” plans like Plan C (and the old Plan F) removed the financial incentive for people to think twice before seeking medical care. The MACRA Act in 2015 phased out these plans for new Medicare enrollees starting in 2020. Whether that policy goal actually works is debatable, but that was the stated reasoning.










