When Should You Get an MRI After a Car Accident?

By Benjamin McCay, DC, CCSP

Published July 16, 2026

After a car accident, many people undergo X-rays in the emergency room or urgent care. If those X-rays are normal but pain persists, patients often ask:

"Do I need an MRI?"

An MRI (Magnetic Resonance Imaging) provides detailed images of the body's soft tissues and can detect injuries that are not visible on standard X-rays.

However, not every patient needs an MRI after a motor vehicle accident. Understanding when MRI is appropriate can help ensure injuries are accurately diagnosed while avoiding unnecessary testing.

What Is an MRI?

MRI uses a powerful magnetic field and radio waves to produce detailed images of soft tissues throughout the body.

Unlike X-rays and CT scans, MRI does not use ionizing radiation.

MRI is particularly useful for evaluating:

• Intervertebral discs
• Ligaments
• Muscles
• Tendons
• Fascia
• Nerves
• The spinal cord
• The brain

Why Aren't MRIs Ordered for Everyone?

MRI is an excellent diagnostic tool, but it is not always necessary immediately after an accident.

Many soft tissue injuries improve with conservative treatment, and MRI findings do not always change the initial treatment plan.

Healthcare providers generally recommend MRI when the results are likely to influence diagnosis or treatment decisions.

When Is an MRI Recommended After a Car Accident?

MRI may be appropriate if you have:

Persistent Neck or Back Pain

Pain that does not improve after several weeks of appropriate treatment may warrant further evaluation.

Pain Radiating Into an Arm or Leg

Radiating pain may suggest irritation or compression of a spinal nerve.

Patients may describe:

• Sciatica
• Arm pain
• Shooting pain
• Burning sensations

MRI can help identify possible causes such as a herniated disc.

Numbness or Tingling

Persistent numbness or tingling may indicate nerve involvement.

MRI can evaluate whether soft tissue structures are compressing nearby nerves.

Muscle Weakness

Weakness following a car accident should always be evaluated carefully.

Depending on the examination findings, MRI may help identify spinal cord or nerve root compression.

Suspected Disc Injury

Symptoms suggesting disc injury include:

• Persistent pain
• Radiating symptoms
• Increased pain when coughing or sneezing
• Neurological deficits

MRI is considered the best imaging study for evaluating spinal discs.

Suspected Ligament Injury

Ligament injuries may create instability and persistent pain.

MRI can provide important information regarding many ligament injuries.

Persistent Headaches or Neurological Symptoms

MRI of the brain may occasionally be recommended for patients with persistent neurological symptoms following head trauma, depending on the clinical situation.

What Can an MRI Show?

MRI can identify many injuries that are difficult or impossible to visualize on standard X-rays.

These include:

Herniated Discs

MRI can demonstrate:

• Disc bulges
• Disc protrusions
• Disc extrusions
• Annular tears

Nerve Compression

MRI helps identify compression affecting spinal nerve roots.

Ligament Injuries

Many spinal ligaments can be evaluated using MRI.

Muscle Injuries

MRI may demonstrate muscle tears, edema, and other soft tissue injuries.

Spinal Cord Abnormalities

MRI is the preferred imaging study for evaluating many spinal cord disorders following trauma.

What Can't an MRI Show?

Although MRI is an excellent imaging tool, it has limitations.

Some painful conditions may have minimal or no visible MRI findings.

Examples include:

• Minor muscle strains
• Certain fascial restrictions
• Some joint dysfunction
• Pain caused by altered movement patterns

For this reason, MRI findings must always be interpreted alongside the patient's history and physical examination.

Does a Normal MRI Mean Nothing Is Wrong?

No.

A normal MRI does not necessarily mean a patient has no injury.

Many painful musculoskeletal conditions may not produce significant MRI abnormalities.

Healthcare providers diagnose patients—not MRI scans.

Clinical examination remains an essential part of determining the source of pain.

MRI vs. X-Ray

MRI vs. CT Scan

CT scans provide detailed images of bone and are frequently used after significant trauma.

MRI is generally superior for evaluating:

• Discs
• Ligaments
• Nerves
• Muscles
• The spinal cord

CT is often preferred when fractures or internal bleeding are suspected.

What Happens During an MRI?

During the examination:

• You lie on a padded table.
• The table moves into the MRI scanner.
• The examination usually lasts 20 to 60 minutes.
• Remaining still improves image quality.

Some MRI studies require intravenous contrast, although many spinal MRIs performed after motor vehicle accidents do not.

Treatment While Waiting for an MRI

Patients do not always need to wait for MRI before beginning conservative care.

Depending on the clinical findings, treatment may include:

Chiropractic Care

Chiropractic treatment may help improve spinal mobility, reduce pain, and restore function for many musculoskeletal injuries following a motor vehicle accident.

Massage Therapy

Massage therapy may help reduce muscle tension, improve circulation, and decrease stiffness.

Therapeutic Exercise

Exercise programs help restore:

• Mobility
• Strength
• Stability
• Functional movement

Treatment recommendations should always be based on the patient's individual diagnosis and clinical examination.

When Should You Seek Immediate Medical Care?

Seek emergency medical attention if you develop:

• Progressive weakness
• Loss of bladder or bowel control
• Severe numbness
• Difficulty walking
• Severe or worsening neurological symptoms -New symptoms after a significant head, neck, or back injury

These symptoms may indicate a more serious condition that requires urgent medical evaluation. Do not wait for a routine chiropractic appointment or outpatient MRI referral if these symptoms are present.

MRI Referrals After a Car Accident in Everett and Lynnwood

At Advanced Chiropractic & Massage, we perform comprehensive examinations to determine whether advanced imaging may be appropriate following a motor vehicle accident.

When clinical findings suggest a disc injury, nerve compression, ligament injury, or other condition requiring further evaluation, we coordinate appropriate MRI referrals and work closely with primary care physicians, radiologists, and specialists to help guide treatment.

Frequently Asked Questions

Should everyone get an MRI after a car accident?

No. MRI is typically reserved for patients whose symptoms or examination findings suggest injuries that require additional evaluation.

How long should I wait before getting an MRI?

The timing depends on your symptoms, examination findings, and your healthcare provider's clinical judgment.

Will an MRI show whiplash?

MRI may identify certain soft tissue injuries associated with whiplash, but many whiplash injuries are diagnosed clinically.

Can I have an MRI if my X-rays were normal?

Yes. Normal X-rays do not rule out soft tissue injuries that may be visible on MRI.

Does insurance cover MRI after a car accident?

Coverage depends on your insurance plan, the clinical indications, and whether the imaging is considered medically necessary.