Yes, Medicare covers MRI of the spine under Part B (Medical Insurance), classified as a diagnostic non-laboratory test. Your doctor needs to order the scan, and the underlying reason must be considered medically necessary. After meeting your Part B deductible, you’ll typically pay 20% of the Medicare-approved amount, which works out to roughly $38 to $71 depending on where you get the scan.
What Medicare Requires for Coverage
Medicare doesn’t cover a spinal MRI simply because you or your doctor want one. The scan has to be medically necessary, meaning there’s a clinical reason to look inside your spine. For routine back or neck pain without alarming symptoms (called “non-red flag” conditions), Medicare’s coverage policy generally requires that you’ve had symptoms for at least one month and that you’ve tried conservative treatment, like physical therapy or medication, for at least four weeks without improvement. Only after that trial period will the MRI typically be approved.
Certain serious symptoms can bypass this waiting period entirely. If your doctor suspects something urgent, such as signs of nerve compression causing weakness or loss of bladder control, a history of cancer that could have spread to the spine, or a possible spinal infection, the MRI can be ordered right away without a trial of conservative care first. These “red flag” conditions signal that delaying imaging could cause real harm.
What You’ll Pay Out of Pocket
Your costs depend on two things: whether you’ve met your annual Part B deductible and where you get the scan. The Part B deductible is $240 in 2024. Once that’s met, you pay 20% of the Medicare-approved amount for the MRI.
Where you go for the scan makes a significant difference in price. Based on Medicare’s national averages, a spinal MRI at a freestanding imaging center or ambulatory surgical center costs about $192 total, with your 20% share coming to roughly $38. The same scan at a hospital outpatient department costs about $356 total, putting your share at around $71. That’s nearly double the cost for the same test, so choosing a standalone imaging center can save you money.
If you have a Medigap (Medicare Supplement) policy, it may cover part or all of that 20% coinsurance. Most Medigap plans, including the popular Plans F, G, C, and N, pay 100% of Part B coinsurance. Plans K and L cover 50% and 75%, respectively. Your Medigap plan kicks in after you’ve paid the Part B deductible, unless your specific plan also covers the deductible.
The Facility Must Be Accredited
Medicare has an important rule that’s easy to overlook. If you’re getting your MRI at a doctor’s office, clinic, or freestanding radiology center (anywhere outside of a hospital), that facility must be accredited for Medicare to pay. If the facility isn’t accredited, Medicare won’t cover the test at all, and you’d be responsible for the full cost. Always confirm accreditation with the imaging center before your appointment.
Medicare Advantage Plans May Add Steps
If you have a Medicare Advantage plan (Part C) instead of Original Medicare, your coverage for spinal MRIs is handled differently. Medicare Advantage plans are required to cover everything Original Medicare covers, but they can add prior authorization requirements. This means you may need the plan’s approval before getting the scan.
Prior authorization for advanced imaging like MRIs is one of the most common requirements in Medicare Advantage plans. A federal investigation by the Office of Inspector General found that advanced imaging, including MRIs and CT scans, was among the most frequently denied service categories in Medicare Advantage, even when the services met standard Medicare coverage rules. The share of services requiring prior authorization has grown over time, with diagnostic procedures seeing some of the fastest increases. If your plan denies prior authorization, you have the right to appeal the decision.
With Original Medicare (Parts A and B), there is no prior authorization step for diagnostic imaging. Your doctor orders the MRI, the facility bills Medicare, and coverage is determined based on whether the medical necessity criteria are met.
How to Keep Your Costs Low
The simplest way to reduce what you pay is to choose a freestanding imaging center over a hospital outpatient department. You’ll get the same MRI with the same diagnostic quality, but your coinsurance could be cut nearly in half. Call ahead to verify the center accepts Medicare assignment and is accredited.
If your doctor orders a spinal MRI and you haven’t yet met your Part B deductible for the year, you’ll pay the remaining deductible amount first, then 20% of whatever is left. For example, if you’ve paid nothing toward your $240 deductible and get a $192 MRI at a freestanding center, you’d pay the full $192 (applied toward your deductible) rather than the usual $38 coinsurance.
Keep documentation of any conservative treatments you’ve tried before the MRI. If Medicare reviews the claim and finds no evidence that you attempted physical therapy, medications, or other initial treatments for at least four weeks (assuming your situation isn’t urgent), the claim could be denied. Your doctor’s office typically handles this documentation, but it’s worth confirming that your medical records reflect the treatments you’ve completed.