Getting an MRI typically starts with a doctor’s visit. A physician, physician assistant, or nurse practitioner evaluates your symptoms, decides imaging is warranted, and submits an order on your behalf. From that point, your insurance may need to approve it before you can schedule the scan. The whole process, from initial appointment to lying in the scanner, can take anywhere from a few days to several weeks depending on insurance requirements and facility availability.
Who Can Order an MRI
An MRI requires a signed order from a qualified healthcare provider. That includes physicians (MDs and DOs), physician assistants, nurse practitioners, and in some cases podiatrists. Your primary care doctor can order one directly, or they may refer you to a specialist who then places the order. Either way, someone with prescribing authority needs to document why the scan is medically necessary before an imaging center will perform it.
The provider placing the order will specify which body part to scan, whether contrast dye is needed, and what clinical question the scan should answer. This information goes to both the imaging facility and, in most cases, your insurance company.
The Insurance Approval Step
Most insurance plans require prior authorization before they’ll cover an MRI. This means your doctor’s office submits the order along with supporting medical documentation, such as your symptoms, physical exam findings, prior treatments you’ve tried, and any earlier imaging results. The insurance company reviews this to confirm the scan meets their criteria for medical necessity.
Approval can come back within a day or two, or it can take a week or more. If your insurer denies the request, the denial letter must include the specific reason and your deadline to file an appeal. Your doctor’s office can often handle the appeal by providing additional clinical justification. If the appeal fails, paying out of pocket at a freestanding imaging center is usually the most affordable alternative.
Medicare uses a similar process. Providers submit the authorization request with all supporting documentation to their Medicare contractor, and the review uses the same medical necessity standards that would apply at the time of billing. The goal is simply to confirm coverage earlier in the process.
How Doctors Decide You Need an MRI
Doctors don’t order MRIs on a whim. Professional guidelines, like the American College of Radiology’s Appropriateness Criteria, map out which imaging study fits which clinical scenario. These are evidence-based recommendations reviewed annually by expert panels. For many neurological conditions, MRI with and without contrast is the preferred choice, with CT playing a supporting role. For a knee injury, an MRI reveals soft tissue damage that X-rays miss entirely.
Your doctor considers what information they actually need. A simple fracture shows up fine on an X-ray. But if they suspect a ligament tear, a herniated disc, or a brain abnormality, MRI provides the soft-tissue detail that other scans can’t match. The clinical question drives the choice.
Getting an MRI Without a Doctor’s Order
A growing number of freestanding imaging centers offer self-pay MRIs without requiring a referral. These are sometimes called direct-to-consumer or walk-in imaging services. You contact the center, choose the body area you want scanned, and pay out of pocket. Some facilities can schedule same-day appointments.
The trade-off is cost and follow-up. Insurance won’t cover a scan you ordered yourself, so you’ll pay the full price. And without a referring physician guiding the process, you’re responsible for getting the results interpreted and acted on. Many of these centers will still have a radiologist read the scan and provide a report, but connecting that report to a treatment plan is on you. This route works best if you already know what you’re looking for and have a provider ready to review the findings.
What an MRI Costs
Total MRI costs range from roughly $700 to over $5,400. The variation is enormous and depends on where you go, what body part is scanned, and whether contrast dye is used. Hospital-based MRIs are consistently more expensive than scans at freestanding radiology centers because hospitals carry higher overhead costs. If you’re paying out of pocket or facing a high deductible, calling independent imaging centers for pricing can save you thousands of dollars for the identical scan.
With insurance, your out-of-pocket share is usually considerably less than the total billed amount. But it still depends on your plan’s deductible, copay structure, and whether the facility is in-network. Always confirm network status before scheduling.
Safety Screening Before the Scan
Before you ever enter the MRI room, the facility will screen you for anything that could interact dangerously with the powerful magnet. This screening is non-negotiable and covers a specific list of concerns.
Certain implants are absolute contraindications. Pacemakers, implantable defibrillators, and cardiac resynchronization devices pose significant risks during MRI. Cochlear implants, neurostimulation systems, and drug infusion pumps (for insulin, pain medication, or chemotherapy) are also incompatible with standard MRI. Metallic foreign bodies in the eyes, such as metal shavings from industrial work, can migrate inside the magnetic field and cause serious injury.
The list extends to cerebral aneurysm clips, catheters with metallic components, bullets or shrapnel fragments, magnetic dental implants, tissue expanders, and body piercings. Some devices, like bone-anchored hearing aids, can be made safe with specific preparation, such as removing the battery and scanning only at certain magnet strengths. The general rule: if there’s no validated safety data for an implant, it’s treated as unsafe until proven otherwise. Be thorough and honest when filling out the screening questionnaire.
How to Prepare for the Appointment
Most MRI scans require no special preparation. You can eat and drink normally beforehand. The main exception is an MRCP, a specific type of scan for the gallbladder and bile ducts, which requires fasting. Your imaging center will tell you if any restrictions apply when you schedule.
If your scan requires contrast dye, an IV line will be placed in your arm during the appointment. You may be asked about kidney function beforehand, since the contrast agent is filtered through the kidneys. Wear comfortable clothing without metal snaps or zippers, or plan to change into a gown. Leave jewelry, watches, and credit cards outside the scan room.
When to Expect Your Results
After the scan, a radiologist reviews the images and writes a report for your ordering provider. On weekdays, this radiologist turnaround time has a median of just over three hours. Scans done on weekends take longer to be read, with a median turnaround of about two and a half days if the radiologist waits until Monday.
But there’s a second delay most people don’t think about: how long it takes your doctor to actually open and read the report. On weekdays, clinicians review radiology reports within about half a day on average. On weekends, that stretches to nearly two days, because most doctors check results during regular business hours. So a scan performed and read over the weekend may sit unreviewed until Monday or Tuesday. If you want the fastest turnaround, schedule your MRI early in the work week. Many patient portals now release radiology reports directly to you, sometimes before your doctor has reviewed them.