Millions of Medicare beneficiaries enrolled in Medicare Advantage plans each year, attracted by low premiums and extra benefits. But circumstances change - doctors leave networks, health needs increase, or coverage gaps become apparent. Switching back to Original Medicare is possible, but there are important timing rules and cost implications to understand.
Why Some People Switch from Medicare Advantage to Original Medicare
Your preferred doctor or specialist left the plan's network
You need care at a hospital not in the plan's network
You're spending more time in a different state and need nationwide coverage
Out-of-pocket costs have increased significantly
You want the freedom to see any Medicare-accepting provider without referrals
Key Takeaways
- You can switch from Medicare Advantage to Original Medicare during the MA OEP (Jan 1–Mar 31) or AEP (Oct 15–Dec 7)
- Medigap plans may require medical underwriting if you switch outside your initial enrollment window
- Costs often increase when moving to Original Medicare without a Medigap supplement
Key Differences: Medicare Advantage vs. Original Medicare
| Feature | Medicare Advantage | Original Medicare |
|---|---|---|
| Network | Restricted (HMO/PPO) | Any Medicare-accepting provider |
| Referrals | Often required (HMO) | Not required |
| Out-of-pocket max | Yes (annual cap) | No cap without Medigap |
| Extra benefits | Dental, vision, hearing | Not included |
| Premiums | Often $0–low | Part B premium + supplement |
How to Switch Step-by-Step
Confirm you're in an eligible enrollment period (MA OEP Jan 1–Mar 31, or AEP Oct 15–Dec 7)
Contact your Medicare Advantage plan to disenroll
Confirm your Original Medicare (Part A and Part B) is active
Consider enrolling in a standalone Part D drug plan
Apply for a Medigap plan - be aware of underwriting requirements
Costs to Expect After Switching
Original Medicare without a supplement has no out-of-pocket maximum. You'll pay the Part B premium ($202.90/month in 2026), 20% coinsurance on most services, and the Part A hospital deductible ($1,736 per benefit period in 2026). A Medigap plan can cover most of these costs but adds a monthly premium.
Mistakes to Avoid When Leaving Medicare Advantage
Disenrolling before confirming your Original Medicare is active
Forgetting to enroll in a Part D plan (you may face a late enrollment penalty)
Assuming you'll automatically qualify for Medigap - underwriting may apply
Switching outside an eligible enrollment period
Can You Get a Medigap Plan After Leaving Medicare Advantage?
This is the most critical issue. Outside of your initial Medigap Open Enrollment Period (which runs for 6 months starting when you're 65+ and enrolled in Part B), insurers can use medical underwriting to deny coverage or charge higher premiums. Some states have birthday rules or other protections - check your state's rules before switching.
Important
If you have significant health conditions, you may be denied Medigap coverage or charged substantially higher premiums when switching outside your guaranteed issue window.
When Can I Switch from Medicare Advantage to Original Medicare?
Will I Automatically Get a Medigap Plan When I Switch?
Do I Need to Re-enroll in Original Medicare after Leaving Medicare Advantage?
Frequently Asked Questions
Can I Switch from Medicare Advantage to Original Medicare at Any Time?
What Happens to My Drug Coverage When I Switch?
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