Picture this. It’s March. Your doctor just said the words “knee replacement,” or “heart procedure,” or “a few weeks of rehab after that fall.”
Your first thought is about getting better.
Your second thought is about the bill.
What happens next depends almost entirely on one choice you made (or never realized you were making) when you signed up for Medicare: Medicare Advantage or Original Medicare with a Medigap plan.
It’s the question we hear most from people turning 65, and it trips up longtime Medicare members too. Here’s the plain-English version.
The 60-Second Version
Original Medicare (Part A and Part B) is run by the federal government. It covers hospital stays and doctor visits. What it does not do is cover everything. After your deductible, you typically pay 20% of most doctor and outpatient services, and there is no yearly limit on what that 20% can add up to.
That gap is why almost everyone picks one of two paths.
Path 1: Original Medicare + Medigap (Medicare Supplement). You keep Original Medicare and add a Medigap policy that pays much of what Medicare leaves behind. You’d also add a separate Part D plan for prescriptions.
Path 2: Medicare Advantage (Part C). You swap Original Medicare for a plan from a private insurance company that bundles hospital, doctor, and usually drug coverage in one. Many include extras like dental, vision, and hearing.
What People Love About Medicare Advantage
Low monthly premiums. Plenty of plans have a $0 plan premium. You still pay your Part B premium, which was $202.90 a month in 2026.
Extras. Dental, vision, hearing, and sometimes gym memberships or over-the-counter allowances.
A yearly cap. Advantage plans have a limit on what you pay out of pocket for covered in-network care. Original Medicare doesn’t.
The trade-offs: You’re working with a network of doctors and hospitals. Some services need prior approval. You’ll often pay a copay each time you use care. And the plan can change its benefits, its network, and its drug list every single year.
What People Love About Medigap
Freedom. See any doctor or hospital in the country that accepts Medicare. No networks. No referrals.
Predictable costs. Popular plans like Plan G cover nearly all of what Original Medicare leaves behind, after a small yearly Part B deductible ($283 in 2026).
Standardized plans. A Plan G is a Plan G whatever company sells it. The difference is the price.
The trade-offs: You pay a monthly premium on top of Part B. Medigap doesn’t include drug coverage, so you need a Part D plan. And it doesn’t come with dental, vision, or hearing.
The Window Nobody Talks About
This is the part that matters most, and it’s the part that rarely makes it into the TV commercials.
When you first sign up for Part B at 65 or older, you get a 6-month Medigap open enrollment period. During that window, insurance companies can’t turn you down or charge you more because of your health.
Miss it, and in most states a company can ask you health questions and say no.
A handful of states have friendlier rules, so where you live matters. And if you join a Medicare Advantage plan when you’re first eligible, you may have a trial period to switch back with guaranteed Medigap rights. But the details depend on your situation and your state.
The point is simple. Picking the cheaper plan today can quietly close doors tomorrow. Ask before you sign, not after.
Why the Timing Matters Right Now
If you’re already on Medicare: The Annual Enrollment Period runs October 15 to December 7, 2026. That’s about four weeks away. Whatever you pick (or leave alone) kicks in January 1, 2027.
Here’s why it’s worth a look this year. Plans can change their premiums, their doctors, their copays, and their drug lists every fall. The Part D yearly out-of-pocket cap also moves to $2,400 in 2027, up from $2,100 this year. If your plan mailed you a thick packet and it went straight into a drawer, go find it.
If you’re turning 65: Your Initial Enrollment Period lasts seven months. It starts three months before your birthday month, includes your birthday month, and runs three months after. Skip Part B when you shouldn’t have, and you can face a late penalty of 10% for every full 12 months you waited. For life.
If you’re already on Medicare Advantage: You also get a second chance each year, from January 1 to March 31, to switch to a different Advantage plan or go back to Original Medicare.
4 Mistakes We See Every Single Year
Choosing by premium alone. A $0 premium can still come with a big bill. Look at what you pay when you actually use care.
Not checking your doctors. Before you enroll, confirm your doctors and your hospital are in the plan’s network. Every time. Every year.
Not checking your prescriptions. Plans decide which drugs they cover and what tier they sit in. A medication that was cheap in 2026 can cost more in 2027.
Letting a plan auto-renew without a look. What fit you last year might not fit you now. A new diagnosis, a new medication, or a move can change everything.
So Which One Is Right for You?
Some people lean toward Medicare Advantage because they’re generally healthy, want lower monthly costs, like the extra benefits, and are comfortable staying within a network.
Others lean toward Medigap because they want the freedom to see any specialist, travel often, spend part of the year somewhere else, or simply want to know their costs ahead of time.
The only way to know is to run your real doctors, your real prescriptions, and your real budget through the plans available in your area. That’s exactly what a good agent does.
Talk to a Real Agent. Not a Call Center.
Most Medicare ads lead to a call center, where someone reads from a script and chases a quota.
Not at Health1. When you call, you reach a real, live agent in our U.S. office. A person who will ask about your doctors and your prescriptions, then compare your options side by side and answer your questions in plain English.
It takes under 15 minutes. It’s completely FREE. And there’s no pressure.
Call Health1 at 800-433-0150 for your FREE Medicare plan comparison.
We pick up. Weekdays 9am to 6pm, and weekends by appointment.
Quick Answers to Common Medicare Questions
Is Medicare Advantage the same as Medicare?
Not exactly. Medicare Advantage is an alternative way to get your Medicare benefits through a private insurance company, instead of through Original Medicare.
Can I have Medicare Advantage and Medigap at the same time?
No. Medigap works only with Original Medicare, so you can’t use the two together.
When is Medicare open enrollment 2026?
October 15 to December 7, 2026, for coverage starting January 1, 2027.
Health1 is a licensed Medicare insurance agency. We are not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. For information on all of your options, contact Medicare.gov or 1-800-MEDICARE.