Medicare Open Enrollment 2027: Advantage vs Original
Medicare open enrollment is drawing a lot of searches this fall, and for good reason: the choice you make before 7 December 2026 shapes your health costs for all of 2027. This guide compares Medicare Advantage and Original Medicare in plain language, walks through the new Part D numbers and gives you a simple worksheet so you can decide with confidence instead of guesswork.
Key takeaways
- Medicare Open Enrollment for 2027 coverage runs from 15 October to 7 December 2026, and changes take effect on 1 January 2027.
- Medicare Advantage usually uses networks and prior authorization but caps your yearly out-of-pocket costs. Original Medicare lets you see any provider that accepts Medicare and is often paired with Medigap and a Part D plan.
- For 2027, the standard Part D deductible rises to $700 and the Part D out-of-pocket cap rises to $2,400.
- Read your Annual Notice of Change, test plans in the Medicare Plan Finder and use free SHIP counseling if you want a second opinion.
Every fall, people with Medicare get a short window to review their coverage and switch if something better fits. It is tempting to let your current plan roll over, and sometimes that is the right call. But plans change their costs, drug lists and networks from year to year, so a plan that suited you in 2026 may not suit you in 2027.
Whether you are new to Medicare, helping a parent or running a small business where older employees or family members ask you for help, the process is the same: understand the two main paths, check what is changing and compare your options against your real health needs.
A quick note before we start: this article is general information, not insurance, medical or financial advice. Medicare rules are detailed and depend on where you live, so confirm the details on Medicare.gov and consider talking with a SHIP counselor or a licensed insurance professional about your own situation.
Key dates for Medicare open enrollment 2027
There are two windows to know about, and they do different jobs.
- Medicare Open Enrollment: 15 October to 7 December 2026. During this period you can switch between Original Medicare and Medicare Advantage, change from one Medicare Advantage plan to another, and join, switch or drop a Part D drug plan. Changes take effect on 1 January 2027.
- Medicare Advantage Open Enrollment Period: 1 January to 31 March. If you are already in a Medicare Advantage plan, you can switch to another Medicare Advantage plan or return to Original Medicare during this window.
The second window is useful as a safety net, but it is narrower. It is mainly for people already in Medicare Advantage, so do not count on it to fix every decision. Treat 7 December as your real deadline.
Pro tip
Put two dates in your calendar: one in mid-November to finish comparing plans, and one around 1 December to confirm that any change went through. Save every confirmation letter or email in a folder labeled "Medicare 2027".
Medicare Advantage vs Original Medicare: the core difference
The biggest decision is not which plan to pick, but which path to follow. Here is how the two compare at a glance.
Original Medicare
Original Medicare is run by the federal government. Part A covers hospital care and Part B covers doctor visits and outpatient care. Its big strength is freedom: you can use any doctor or hospital in the country that accepts Medicare, usually without a referral.
Original Medicare on its own does not include most prescription drug coverage and has no yearly out-of-pocket cap. That is why many people pair it with two extras: a Medigap (Medicare Supplement) policy to help with costs Original Medicare does not pay, and a separate Part D plan for prescriptions.
Medicare Advantage
Medicare Advantage plans, sometimes called Part C, are offered by private insurers approved by Medicare. They bundle hospital and medical coverage, and many include drug coverage too. Medicare Advantage plans usually use provider networks and prior authorization, which means you may need to stay in network and get approval before certain care.
The trade-off is protection on the cost side: Medicare Advantage plans have a yearly out-of-pocket maximum for covered services. Once you reach it, the plan covers the rest of your covered care for the year.
| Original Medicare | Medicare Advantage | |
|---|---|---|
| Choice of providers | Any provider that accepts Medicare | Usually a network |
| Approvals | Fewer approval steps | Prior authorization is common |
| Yearly out-of-pocket cap | None on its own | Yes, for covered services |
| Drug coverage | Usually a separate Part D plan | Often included |
| Common add-on | Medigap policy | Not used with Medigap |
Common mistake
Switching from Original Medicare to Medicare Advantage because of a flyer or an ad, without checking whether your doctors are in the plan's network. If your main doctor or specialist is not in the network, you may face higher costs or need to change providers. Always confirm your doctors directly with the plan and the doctor's office before you switch.
The Medigap catch if you leave Medicare Advantage later
This is the point many people only learn about too late. If you join Medicare Advantage and later want to return to Original Medicare with a Medigap policy, getting that Medigap policy may not be simple.
If you leave Medicare Advantage outside your initial window, Medigap insurers in most states can use medical underwriting. In practice, that means they can look at your health history when deciding whether to sell you a policy and at what price. Some states have extra protections, so the rules where you live matter.
So if you are considering a move from Original Medicare with Medigap to Medicare Advantage, think of it as a decision that may be hard to reverse. Ask your state's SHIP program how Medigap rules work in your state before you give up an existing Medigap policy.
What is changing for 2027
Several numbers move for 2027, and they affect how much you could pay for prescriptions and premiums.
Part D drug coverage
- Standard deductible: $700 for 2027, up from $615 in 2026. Individual plans can set a lower deductible, so check each plan's details.
- Out-of-pocket cap: $2,400 for 2027, up from $2,100 in 2026. Once your covered drug costs reach the cap, covered Part D drugs cost nothing for the rest of the year.
The cap is good news if you take expensive medicines, because it limits your worst case. If you take only a few low-cost drugs, the deductible and each plan's drug list will matter more than the cap.
Part B premium
The standard Part B premium is $202.90 a month in 2026. The Medicare Trustees projected $209.50 for 2027, but as of late October 2026 CMS had not announced the official 2027 figure. Check Medicare.gov for the final number before you build your 2027 budget.
Your Annual Notice of Change
If you have a Medicare Advantage or Part D plan, your plan sends an Annual Notice of Change (ANOC) each fall. It lists what will be different next year, such as premiums, copays, the drug list and the network. Read it carefully even if you plan to stay put. It is the quickest way to spot a change that affects you.
How to compare your Medicare options step by step
You do not need to be a Medicare expert to make a good choice. Follow these steps, ideally with a notebook or spreadsheet open.
- List your doctors and hospitals. Write down every provider you want to keep, including specialists and the hospital you prefer.
- List your prescriptions. Note each drug, the dose and how often you fill it. This is the most important input for Part D.
- Read your ANOC. Mark anything that changes for 2027, such as premiums, copays or a drug moving to a different tier.
- Use the Medicare Plan Finder. On Medicare.gov, enter your ZIP code and your drugs to see plans available where you live and estimated costs.
- Check networks directly. For each Medicare Advantage plan on your shortlist, confirm your doctors with the plan and with the doctor's office.
- Estimate a normal year and a bad year. Add premiums to your expected costs, then compare the worst case for each option.
- Get free help if you want it. Book a session with your State Health Insurance Assistance Program (SHIP) for free one-on-one counseling.
- Enroll and save proof. Make your change before 7 December 2026 and keep the confirmation.
A Medicare comparison worksheet
Copy this table into a spreadsheet and add one row for each option you are considering. All amounts below are made-up examples for illustration only, not real plan prices.
| Option | Monthly premiums (example) | Doctors covered? | Drugs covered? | Prior authorization? | Worst-case yearly cost (example) | Notes |
|---|---|---|---|---|---|---|
| Original Medicare + Medigap + Part D | $400 (example) | Any provider accepting Medicare | Yes, all four | Rarely | $5,500 (example) | Most flexible, higher premiums |
| Medicare Advantage Plan A | $210 (example) | Main doctor yes, cardiologist no | Three of four | Yes, for some services | $8,000 (example) | Network gap for heart specialist |
| Medicare Advantage Plan B | $230 (example) | Yes, all | Yes, all four | Yes, for some services | $7,200 (example) | Check hospital in network |
Add a "travel needs" column if you spend part of the year in another state.
Hypothetical example
Imagine Linda, 68, a retired bookkeeper who still does some freelance work. She has Original Medicare with a Medigap policy and a Part D plan, and she spends winters with her daughter in another state. A Medicare Advantage plan with a lower premium looks tempting. When she runs the worksheet, she finds that her cardiologist is out of network and that the plan's network is local. She also learns from a SHIP counselor that if she left Medigap and later wanted it back, she might face medical underwriting. Linda decides to keep Original Medicare and simply compares Part D plans for 2027, switching to one that covers all her drugs. (Names and details are made up for illustration.)
Who each option tends to suit
There is no single right answer, but patterns help you think it through.
- Original Medicare with Medigap and Part D often suits people who want the widest choice of providers, travel often, see several specialists or value predictable costs and are willing to pay higher premiums for that.
- Medicare Advantage often suits people who are comfortable with a network, like having one plan for most of their coverage and want a yearly out-of-pocket maximum.
- Either path works best when you have checked your actual doctors and drugs, not just the headline premium.
Small business owners who employ people near Medicare age may also get questions about this. You do not need to give advice, but sharing the dates, Medicare.gov and the SHIP program is a kind and useful step. Workers under 65 choosing employer or Marketplace coverage can use our separate open enrollment checklist instead.
Your Medicare open enrollment checklist
- Mark 7 December 2026 as your deadline for 2027 changes
- Read your Annual Notice of Change and note what is different
- List your doctors, hospitals and prescriptions
- Decide whether Original Medicare or Medicare Advantage fits your life better
- Compare Part D coverage with the 2027 deductible and cap in mind
- Run your options through the Medicare Plan Finder
- Confirm networks directly with plans and doctors' offices
- Ask SHIP about Medigap rules in your state before leaving a Medigap policy
- Check Medicare.gov for the official 2027 Part B premium
- Enroll, then save the confirmation
Frequently asked questions
What happens if I do nothing during Medicare open enrollment?
In many cases your current coverage continues into 2027, but your plan's premiums, copays, drug list or network may change. That is why it is worth reading your Annual Notice of Change and actively confirming that your plan still fits.
Can I switch back to Original Medicare if I do not like my Medicare Advantage plan?
Yes, during Medicare Open Enrollment, and also during the Medicare Advantage Open Enrollment Period from 1 January to 31 March if you are already in a Medicare Advantage plan. Keep in mind that buying a Medigap policy afterward may involve medical underwriting in most states, unless your state offers extra protections.
Is the 2027 Part B premium final?
As of late October 2026, CMS had not announced the official 2027 Part B premium. The Medicare Trustees projected $209.50 a month, compared with $202.90 in 2026. Check Medicare.gov for the final figure.
Where can I get free, unbiased help?
Your State Health Insurance Assistance Program (SHIP) offers free one-on-one counseling. You can also use the Medicare Plan Finder on Medicare.gov to compare plans available in your area.
Related reading
The bottom line
Medicare open enrollment is your yearly chance to make sure your coverage still fits. Decide first between Original Medicare and Medicare Advantage, weighing provider freedom against networks and an out-of-pocket maximum, and remember the Medigap underwriting catch before you leave a Medigap policy. Then check your Part D options against the 2027 deductible of $700 and cap of $2,400.
Set aside an hour this week, read your Annual Notice of Change, fill in the worksheet and run your drugs through the Plan Finder. Make your choice before 7 December 2026, and you can start 2027 knowing exactly what your coverage looks like.
