The Great Medicare U-Turn: How to Switch Back to Original Medicare
If you’ve spent the last year realizing that Medicare Advantage isn’t working for you — prior authorization denials, limited networks, surprise bills — you’re not alone. Thousands of Arizona seniors make the switch back to Original Medicare every year. In this guide, you’ll learn exactly how to switch from Medicare Advantage to Original Medicare, what windows are available, and what to watch out for.
Why People Switch from Medicare Advantage to Original Medicare
The most common reasons I hear from clients who want to switch from Medicare Advantage to Original Medicare:
- Their doctor left the plan’s network
- Prior authorization delays for procedures or specialists
- Moving to a different part of Arizona or another state
- Wanting access to Mayo Clinic or a major specialty hospital
- High out-of-pocket costs after a serious illness
- The plan’s benefits changed significantly at renewal
When Can You Switch from Medicare Advantage to Original Medicare?
There are two main windows to switch from Medicare Advantage to Original Medicare. Missing these windows means waiting until the next opportunity.
Medicare Advantage Open Enrollment Period (MA OEP)
January 1 – March 31 every year. During this window you can switch from one Medicare Advantage plan to another, or drop Medicare Advantage entirely and return to Original Medicare. Coverage changes take effect the first of the following month.
Annual Enrollment Period (AEP)
October 15 – December 7 every year. This is the main Medicare enrollment window. You can drop your Medicare Advantage plan and return to Original Medicare, with changes taking effect January 1. According to Medicare.gov, this is the primary window for making coverage changes.
The One-Way Door Problem: Medical Underwriting
Here’s the critical issue most people don’t know about when they try to switch from Medicare Advantage to Original Medicare: returning to Original Medicare is only half the equation.
Once you’re back on Original Medicare, you’ll want a Medicare Supplement (Medigap) Plan G to cover your out-of-pocket costs. But outside of your original 6-month Medigap open enrollment window, insurance companies can use medical underwriting — meaning they can deny you coverage or charge higher premiums based on your health history.
This is why I always tell clients: if you’re on Medicare Advantage and thinking about switching, do it sooner rather than later. The longer you wait, the more your health may change, and the harder it becomes to qualify for Medigap.
Special Enrollment Periods for Switching
In some situations you may qualify for a Special Enrollment Period (SEP) to switch from Medicare Advantage to Original Medicare outside the standard windows:
- You moved out of your plan’s service area
- Your plan is leaving the Medicare program
- You qualify for Extra Help (Low Income Subsidy)
- You were misled by your plan or agent
The Social Security Administration and Medicare handle these situations case by case. If you think you qualify, act quickly — SEP windows are typically 60 days.
Step-by-Step: How to Switch Back to Original Medicare
- Confirm you’re in an eligible enrollment window (MA OEP, AEP, or SEP)
- Contact your Medicare Advantage plan to disenroll — call the number on your plan card
- Confirm your return to Original Medicare Parts A and B
- Apply for a Medicare Supplement (Medigap) plan — do this simultaneously if possible
- Sign up for a Part D prescription drug plan if you need one
Ready to Switch? I Can Help
I’m Andy Orlikoff, an independent Medicare broker in Surprise, AZ. I don’t sell Medicare Advantage — and I help Arizona seniors navigate the process to switch from Medicare Advantage to Original Medicare and get enrolled in the right Medigap plan. My help costs you nothing extra.
Call or text: (623) 742-3878
Email: andy@azhealth.us
Fill out the contact form →
Serving Surprise, Phoenix, Peoria, Glendale, Goodyear, Buckeye, Scottsdale, Mesa, Chandler, Gilbert, and all of Arizona.
American Insurance Benefits | 14955 W Bell Rd #8031, Surprise, AZ 85374 | Licensed Arizona Insurance Broker since 2004