Getting a brain MRI starts with a doctor’s order. You can’t walk into an imaging center and request one yourself. In nearly all cases, a physician needs to determine that the scan is medically necessary, write a referral, and coordinate with your insurance before you can schedule the appointment. The process from first visit to results typically takes a few weeks, though it moves faster when symptoms are urgent.
Why a Doctor Would Order a Brain MRI
A brain MRI creates detailed images of your brain’s structure using powerful magnets and radio waves, with no radiation involved. Doctors use it to investigate symptoms that suggest something is happening inside the brain that can’t be diagnosed through a physical exam alone. Common reasons include persistent or severe headaches, dizziness, seizures, vision changes, hearing loss, or sudden inability to move part of your body.
The scan can help diagnose strokes, brain tumors, multiple sclerosis, and other conditions that cause visible changes in brain tissue. It’s also used before brain surgery to map areas that control speech or memory. If you’re experiencing any of these symptoms, your primary care doctor is the right starting point. They’ll evaluate your symptoms, rule out simpler explanations, and decide whether imaging is the next step or whether you should see a neurologist first.
The Referral Process
There are two common paths to getting a brain MRI. Your primary care doctor can refer you directly to an imaging center, or they can send you to a neurologist who then orders the scan after their own evaluation. For conditions like chronic migraines, some doctors refer straight to MRI while others prefer you see a specialist first. The route often depends on your symptoms, your doctor’s clinical judgment, and your insurance plan’s requirements.
If your insurance requires prior authorization (and many do for brain MRIs), your doctor’s office handles this step. They submit documentation explaining why the scan is medically necessary, and the insurer approves or denies it before you can schedule. This can add several days to a week to the timeline. Once authorization is secured, you’ll contact the imaging center to book your appointment.
What a Brain MRI Costs
Cost varies widely depending on your insurance, the facility, and whether contrast dye is used. Medicare patients pay roughly $100 to $135 out of pocket on average for an outpatient brain MRI, based on 2026 national payment rates. With private insurance, your share depends on your deductible and copay structure. Without insurance, brain MRIs at freestanding imaging centers are often significantly cheaper than hospital-based facilities. Calling ahead for a self-pay quote is always worth doing, as prices between facilities in the same city can differ by hundreds of dollars.
With or Without Contrast Dye
Your doctor will specify whether you need a standard brain MRI or one with contrast. Contrast-enhanced scans use an injected dye (a gadolinium-based agent) that makes certain tissues, blood vessels, and abnormalities show up more clearly. Tumors, infections, and inflammation are easier to spot with contrast because they absorb the dye differently than healthy tissue.
The injection goes into a vein in your arm before or during the scan. Most people feel a brief coolness or warmth at the injection site. Mild side effects like headache or nausea are possible but uncommon. Allergic reactions, including rash, itching, or difficulty breathing, are rare but require immediate medical attention.
Before receiving contrast, you’ll be asked about kidney problems, diabetes, and high blood pressure, especially if you’re over 60. The dye is processed by your kidneys, and people with reduced kidney function face a higher risk of complications. Small amounts of gadolinium can remain in the brain, bones, and skin for months or years, though the clinical significance of this for people with healthy kidneys is still being studied. Your doctor will only order contrast when the diagnostic benefit justifies it.
Metal Implants and Safety Screening
Because an MRI machine uses an extremely powerful magnet, any metal in or on your body is a safety concern. Before your scan, you’ll fill out a detailed screening questionnaire. The imaging team needs to know about every implant, surgical clip, or device in your body.
Medical devices fall into three categories. Some are labeled “MR Safe,” meaning they contain no magnetic or metallic components and pose no risk. Others are “MR Conditional,” meaning they’ve been tested and are safe under specific conditions (certain machine strengths, for example). Devices labeled “MR Unsafe” mean you cannot have the scan while that device is implanted or attached to you. Cardiovascular stents, certain brain aneurysm clips, and some types of endovascular grafts are among the device types most likely to carry conditional or unsafe designations.
Pacemakers, cochlear implants, and metal fragments from prior injuries all require careful evaluation. If you have any implant, bring the manufacturer’s card or documentation so the MRI team can verify its safety rating. Don’t assume an implant disqualifies you. Many modern devices are MRI-compatible, but the team needs to confirm before proceeding.
Managing Claustrophobia and Anxiety
A standard brain MRI machine is a narrow tube, and your head will be inside it for the duration of the scan. If that idea makes you anxious, you’re not alone. Claustrophobia is one of the most common reasons people delay or avoid MRIs.
You have several options. Mild sedation, where you’re relaxed and drowsy but still conscious, is the most common approach. Your doctor can prescribe an oral sedative to take before your appointment. You’ll need someone to drive you home afterward. For people who need deeper sedation, some facilities offer MRIs under monitored anesthesia care, where an anesthesiologist keeps you in a state between very sleepy and lightly unconscious. General anesthesia is used only rarely, typically for patients who can’t stay still due to a medical condition.
Some imaging centers have open or wide-bore MRI machines that feel less confining. Image quality can vary with these machines, so ask your doctor whether an open MRI would still provide the diagnostic detail needed for your situation. Simpler strategies like closing your eyes, using earplugs or headphones (the machine is loud), and practicing slow breathing also help many people get through the scan comfortably.
What Happens During the Scan
A brain MRI takes about 30 minutes to an hour. Contrast-enhanced scans tend to run longer. You’ll lie on a padded table that slides into the machine, and a coil (a frame-like device) is placed around your head to improve image quality. The machine produces loud knocking and buzzing sounds during each imaging sequence, with brief pauses in between. You’ll be given earplugs or headphones.
The single most important thing you need to do is stay still. Even small movements blur the images and may require repeating a sequence, which extends your time in the machine. You’ll be able to communicate with the technologist through an intercom, and you’ll have a squeeze ball or button to signal if you need to stop.
There’s no pain involved. The machine doesn’t touch you. Some people feel a slight warming sensation in the area being scanned, which is normal. If you received contrast, the IV is removed after the scan and you can resume normal activities immediately.
Getting Your Results
A radiologist reviews your images and sends a written report to the doctor who ordered the scan. In a non-emergency setting, this typically takes one to two weeks. Emergency scans, such as those checking for a brain bleed or acute stroke, are read as quickly as possible, sometimes within minutes.
Many hospitals and imaging centers now offer patient portal access where you can view your images and report online, sometimes before your doctor has had a chance to discuss them with you. Keep in mind that radiology reports are written in technical language. Your ordering doctor will interpret the findings, explain what they mean for your specific situation, and outline any next steps.