Why Mild Traumatic Brain Injury Claims Get Denied—And How to Prove Yours

Why Mild Traumatic Brain Injury Claims Get Denied—And How to Prove Yours

Last updated: March 2026

Mild TBI claims face high denial rates because CT and MRI scans often appear normal despite real symptoms. Winning requires specialized medical evidence, neuropsychological testing, and attorneys who understand how to prove invisible injuries.

Your scans came back “normal.” The ER discharged you. But weeks later, you can’t concentrate at work. You forget conversations. Headaches won’t stop. Bright lights make you nauseous. Your relationships are suffering.

You have a traumatic brain injury. The scans just didn’t show it.

This is the reality for hundreds of thousands of Americans every year. Mild traumatic brain injuries—often dismissed as “just a concussion”—don’t appear on standard imaging. Insurance companies know this, and they use it to deny claims. But these injuries are real, the damage is real, and with the right evidence and legal strategy, they can be proven.

What Is a Mild Traumatic Brain Injury?

“Mild” refers to initial presentation, not long-term impact. MTBI includes concussions and injuries causing a brief loss of consciousness or an altered mental state—even without visible damage on imaging.

The word “mild” is misleading. In medical terminology, it refers to the severity of the initial trauma, not the lasting consequences. A person can sustain a “mild” TBI and suffer debilitating symptoms for months, years, or permanently.

Approximately 1.5 million Americans sustain a traumatic brain injury each year. About 75% are classified as mild, meaning the patient experienced brief or no loss of consciousness, a Glasgow Coma Scale score of 13–15, and no skull fracture or intracranial bleeding visible on CT scan.

But here’s what the classification doesn’t capture: an estimated 10–20% of MTBI patients develop persistent post-concussive symptoms that don’t resolve. Researchers call this group “the miserable minority”—people whose lives are fundamentally altered by an injury the medical system often fails to detect, diagnose, or treat properly.

What Are the Symptoms of Mild TBI?

Symptoms include chronic headaches, memory problems, difficulty concentrating, sleep disturbances, mood changes, light and noise sensitivity, and cognitive fatigue—often invisible to others.

MTBI has been called a “silent epidemic” because its symptoms are subjective and invisible. You look fine. Scans look fine. But nothing feels fine.

Common symptoms of mild traumatic brain injury:

• Chronic headaches: Persistent or recurring head pain that doesn’t respond to typical treatments
• Memory problems: Short-term memory loss, forgetting conversations, misplacing items, repeating yourself
• Concentration difficulties: Inability to focus, easily distracted, trouble completing tasks
• Word retrieval problems: Difficulty finding the right word, slower speech, trouble following conversations
• Sleep disturbances: Insomnia, excessive fatigue, sleeping far more or less than before the injury
• Sensory sensitivity: Light, noise, and crowded environments become overwhelming or painful
• Mood and personality changes: Irritability, anxiety, depression, emotional volatility, impulsiveness
• Cognitive fatigue: Mental exhaustion from tasks that previously required little effort
• Dizziness and balance problems: Vertigo, unsteadiness, nausea

These symptoms cascade into functional disabilities. People lose jobs because they can’t perform. Marriages suffer because personality changes strain relationships. Simple tasks become exhausting. The injury affects not just the victim but everyone in their life.

Why Do Insurance Companies Deny Mild TBI Claims?

Standard CT and MRI scans don’t detect most mild TBIs. Insurers exploit this gap, arguing that “normal” imaging means no injury—or that symptoms are exaggerated, psychological, or unrelated to the accident.

Insurance companies and defense attorneys know exactly how to attack MTBI claims. They’ve developed a playbook:

• “The scans are normal.”: They argue that if imaging doesn’t show damage, there is no damage. This ignores that MTBI affects cellular function, not visible structures.
• “Symptoms are subjective”: Without objective proof, they claim the plaintiff is exaggerating or malingering for financial gain.
• “It’s psychological, not physical”: They attribute symptoms to pre-existing depression, anxiety, or stress—not the brain injury.
• “No treatment protocol means no real injury”: Because many doctors don’t know how to treat MTBI, defendants argue the lack of consistent treatment undermines the claim.
• “Symptoms would have resolved”: They cite statistics that most concussions resolve in weeks, dismissing the minority who develop chronic symptoms.

These arguments work—unless the plaintiff’s legal team knows how to counter them with the right evidence and expert testimony.

How Do You Prove a Mild Traumatic Brain Injury?

Proving MTBI requires neuropsychological testing, advanced imaging when available, documented symptom progression, expert testimony, and evidence showing how the injury has affected daily functioning.

Building a successful MTBI claim requires evidence that goes beyond standard medical records:

• Neuropsychological testing: A comprehensive battery of cognitive tests administered by a neuropsychologist can objectively measure deficits in memory, attention, processing speed, and executive function. These results are difficult for insurers to dismiss.
• Advanced imaging: While standard CT and MRI often appear normal, specialized techniques like diffusion tensor imaging (DTI), functional MRI (fMRI), and PET scans can reveal damage invisible on conventional imaging. These technologies are increasingly accepted in litigation.
• Documented symptom timeline: Consistent medical records showing symptoms from immediately after the accident through ongoing treatment establish that the injury is real and persistent.
• Lay witness testimony: Family members, friends, and coworkers who can describe changes in personality, memory, and functioning provide powerful evidence of how the injury has affected daily life.
• Vocational evidence: Employment records, performance reviews, and expert testimony about earning capacity demonstrate concrete financial losses.
• Expert witnesses: Neurologists, neuropsychologists, and life care planners who can explain the injury mechanism, validate symptoms, and project future needs.

Recent advances in diagnostic technology and the medical community’s growing understanding of concussion science have made MTBI claims more viable than ever. What was once dismissed as “in your head” can now be measured, documented, and proven.

Why Does Your Choice of Attorney Matter in TBI Cases?

TBI litigation requires attorneys who understand neuroscience, know which experts to retain, and can translate complex medical evidence into compelling arguments for juries and insurers.

Not every personal injury attorney can handle a mild TBI case effectively. These cases demand specific expertise:

• Medical knowledge: Understanding brain anatomy, injury mechanisms, diagnostic methods, and treatment protocols
• Expert networks: Relationships with neurologists, neuropsychologists, neuroradiologists, and other specialists who can evaluate and testify about the injury
• Trial experience: The ability to present complex medical evidence in terms a jury can understand—and find compelling
• Resources: TBI cases require significant investment in experts, testing, and litigation costs. Firms without resources may push for quick, inadequate settlements.

Insurance companies recognize when they’re facing attorneys who understand TBI science versus those who don’t. The difference affects not just trial outcomes but settlement negotiations from day one.

Get the Representation Your Brain Injury Deserves

Stampone O’Brien Dilsheimer Law represents traumatic brain injury victims throughout Pennsylvania. Led by trial attorneys Joe Stampone, Kevin O’Brien, and J.B. Dilsheimer—with an in-house medical doctor on staff—we have the expertise to prove injuries that others dismiss and the trial experience to hold negligent parties accountable.

If you or a loved one is struggling with the lasting effects of a concussion or brain injury, call 267-214-9695 to discuss your case.