Traumatic Brain Injury (TBI) VA Disability Rating & Claims Guide

Condition Guides

Oct 13

Last updated: October 2026

A traumatic brain injury doesn't always look like an injury. Maybe you walked away from a blast, a rollover, or a bad fall and went right back to work. Years later, you lose your train of thought mid-sentence, your temper is shorter than it used to be, and the headaches won't quit. Now you're wondering whether VA will see any of that, especially if your records only say "mild TBI," or say nothing at all.

The way VA rates TBI is very different from how it rates most other conditions. Once you understand the system, you can see what VA needs from you. This guide covers how VA defines and rates TBI, the three paths to service connection, what evidence helps, what happens at the exam, and why complete symptom reporting matters so much.

TBI at a Glance

Diagnostic code: VA rates TBI under Diagnostic Code 8045, "Residuals of traumatic brain injury," in 38 CFR 4.124a.
Available ratings: 0%, 10%, 40%, 70%, and 100%, based on the most impaired area of function.
Paths to service connection: Direct, meaning an in-service head injury caused your current residuals. Secondary, meaning a condition caused or worsened by an already service-connected TBI. Presumptive, meaning certain conditions VA assumes are caused by a service-connected TBI if they show up within set time windows.
Key evidence: Records of the in-service event, buddy statements, family statements about changes they've noticed, and a current medical or neuropsychological evaluation.
Main exam: A C&P exam, usually with a specialist, built around the TBI Disability Benefits Questionnaire (DBQ) and its rating areas.
Official criteria: Read the full TBI rating criteria on eCFR.

How the VA Defines TBI

VA treats TBI as an injury-based condition within the neurological conditions section of the rating schedule. What VA rates is not the injury itself. It rates the residuals, meaning the symptoms and limitations you still live with today.

The regulation recognizes three main areas of dysfunction that can result from TBI:

Cognitive: Memory, attention, concentration, and executive function, which covers planning, organizing, and following through. The regulation notes that cognitive problems are common in varying degrees after TBI.
Emotional and behavioral: Irritability, mood changes, impulsivity, and similar changes.
Physical: Headaches, dizziness, vision problems, motor problems, and other neurological effects.

"Mild" on Paper Doesn't Mean Mild Today

This is one of the most misunderstood parts of TBI claims. Your medical records may label your injury mild, moderate, or severe. Many veterans assume a "mild TBI" label means a low rating, or no rating at all.

That isn't how the rules work. According to the rating criteria, those terms refer to a classification made at, or close to, the time of injury. They are not a measure of how you're functioning now. Someone whose injury was classified as mild in 2008 can have significant residuals today. VA rates the current picture.

The label still matters in one place: the presumptive conditions covered below. Some of those depend on whether the original injury was mild or moderate to severe.

How TBI Gets Diagnosed for VA Purposes

An ER note from years ago saying "head injury, released" usually isn't enough on its own. VA needs evidence of a TBI and evidence of current residuals. That most often comes from the initial C&P exam, or from a private neurological or neuropsychological evaluation that documents what you're dealing with now.

Physical Residuals Are Rated Separately

Some physical effects of TBI get their own ratings under other parts of the schedule. For example, if TBI causes partial loss of use of an arm or leg, VA rates it by comparison with peripheral nerve paralysis, using the mild, moderate, severe, or complete paralysis levels. A residual that is its own diagnosable condition, such as migraine headaches, can sometimes be rated separately under its own diagnostic code.

How the VA Rates TBI

TBI ratings work differently from most conditions. VA doesn't add up every symptom. It looks at roughly ten areas of function, sometimes called "facets," and scores each one. In plain terms, the areas are:

Memory, attention, concentration, and executive function
Judgment
Social interaction
Orientation
Motor activity
Visual spatial orientation
Subjective symptoms, such as headaches, dizziness, or fatigue
Neurobehavioral effects, such as irritability or impulsivity
Communication
Consciousness

Check the official table for the exact wording of each area. The key mechanic is this: each area is scored 0, 1, 2, 3, or "total," and the single worst-scoring area sets your overall TBI rating. VA doesn't average your scores. If nine areas score 1 and one area scores 3, the 3 controls.

That's why the details of every area matter. A memory problem you mention in passing might be the area that decides your rating.

Here's what each rating level generally means:

Rating	What it generally means
0%	Your highest score in any area is 0. Symptoms may be present but don't meaningfully limit function.
10%	Your highest score in any area is 1, meaning mild impairment in the most affected area.
40%	Your highest score in any area is 2, meaning moderate impairment in the most affected area.
70%	Your highest score in any area is 3, meaning severe impairment in the most affected area.
100%	At least one area is scored "total," meaning the most serious level of impairment.

Read the full rating criteria on eCFR. The regulation spells out exactly what each score looks like in each area, and it's worth reading the descriptions for any area that affects you.

Pyramiding and Overlapping Conditions

VA can't rate the same symptom twice under two different conditions. That rule is called pyramiding, and it's set out in 38 CFR 4.14. It comes up often with TBI because TBI symptoms overlap with mental health conditions.

For example, anxiety can count toward TBI's subjective symptoms area. If you have a diagnosed anxiety disorder, VA generally rates that disorder separately under the mental health criteria instead. You can hold both a TBI rating and a mental health rating. VA just has to sort out which symptoms belong to which condition so nothing gets counted twice.

TBI often comes with other ratings, like headaches, a mental health condition, or tinnitus. VA doesn't add those together. If you want to understand your overall number, here's how VA combines multiple ratings.

A Proposed Change to Watch

On November 12, 2024, VA published a proposed rule to update the neurological section of the rating schedule. It covers 38 CFR 4.124a, where the TBI criteria live. VA said the goals are to reflect medical advances, update terminology, and provide clearer evaluation criteria. A proposed rule is not the law. Until a final rule takes effect, the current criteria apply. Check the Federal Register for a final rule if you're filing or appealing soon.

Getting TBI Service Connected

Direct Service Connection

Most TBI claims start here. Direct service connection under 38 CFR 3.303 requires three things:

A current diagnosis of TBI with residual symptoms.
An in-service event, such as a blast exposure, vehicle accident, fall, training mishap, or sports injury.
A nexus, which is a medical opinion linking your current residuals to that event. VA's standard is whether the link is "at least as likely as not," meaning a 50% chance or better.

The in-service event is where TBI claims often get stuck. Many of us didn't go to sick call after a blast or a hard hit. We had a headache, maybe saw stars, and went back to the mission. That's normal, and it doesn't end your claim. Lay evidence, covered below, is built for this situation. If your injury happened in combat, VA can generally give extra weight to your own statement about the event when it fits the circumstances of your service.

Secondary Service Connection

Secondary service connection means one service-connected condition caused or worsened another. Once your TBI is service-connected, you can claim conditions that grew out of it. Chronic headaches are one example. A sleep problem that a doctor links to your TBI is another.

For conditions outside the presumptive list below, you need a nexus opinion explaining how the TBI caused or aggravated the second condition. Aggravation counts. If a condition existed already but your TBI made it worse, that can qualify too.

Presumptive Service Connection

This is where TBI claims have a real advantage. Under 38 CFR 3.310, certain conditions are presumed to be caused by a service-connected TBI. You don't need a nexus opinion for these. The conditions and their time windows are:

Condition	When it qualifies
Parkinsonism, including Parkinson's disease	Following moderate or severe TBI
Unprovoked seizures	Following moderate or severe TBI
Dementia (presenile dementia of the Alzheimer type, frontotemporal dementia, or dementia with Lewy bodies)	Manifests within 15 years of moderate or severe TBI
Depression	Manifests within 3 years of moderate or severe TBI, or within 12 months of mild TBI
Hormone deficiency diseases from hypothalamo-pituitary changes	Following moderate or severe TBI

These presumptions came from a 2012 VA rulemaking. That rulemaking relied on a National Academies report that found sufficient evidence of an association between TBI and these conditions.

Three practical points:

Your TBI has to be service-connected first. The presumptions apply only to veterans who already have a service-connected TBI. If your TBI claim is still pending, file the secondary condition with it, or right after it's granted.
The bar for VA to deny is high. VA can only overcome the presumption with "clear evidence to the contrary." That favors you.
Missing a window doesn't end your claim. If your depression started four years after a moderate TBI, you can still claim it as secondary with a nexus opinion. You just won't get the presumption.

Notice that the original injury label matters here. Depression has a longer window after a moderate or severe TBI than after a mild one, and most of the other presumptions require moderate or severe. That's the one place where the label from the time of injury still counts.

Evidence That Strengthens Your Claim

Strong TBI claims usually combine records from the time of the injury with a clear picture of how you're doing now. Here's what helps most:

In-service records: Incident reports, line of duty determinations, sick call notes, awards or evaluations mentioning the event, or deployment records placing you where it happened. If you're not sure what's in your file, start by requesting your VA C-file.
Buddy statements: People who were there for the blast, crash, or fall can describe what happened and how you seemed afterward. Use VA Form 21-10210 for these statements.
Family and friend statements: Lay evidence is testimony from people who have seen your symptoms firsthand. A spouse who noticed you started forgetting appointments, or a parent who saw your personality change after you came home, is describing exactly what the rating areas measure.
A current evaluation: A neurological or neuropsychological evaluation that documents your present symptoms across the cognitive, emotional, and physical areas.
A private DBQ: Your treating provider can fill out the public TBI Disability Benefits Questionnaire and submit it to VA. A provider who has seen you over time can often describe your symptoms more fully than someone meeting you once.

Complete, Honest Reporting Is Evidence Too

The most important evidence in a TBI claim is often your own account of your symptoms, and it has to be complete. I had a client whose TBI claim was initially rated at 0%. After they accurately reported their symptoms, the rating went to 70%. Nothing about their injury changed. What changed was the information VA had.

This makes sense once you know how the rating works. The worst area sets the rating. If a symptom never gets described, it never gets scored. Before your exam, write down how TBI affects you in each area: memory, judgment, social life, orientation, communication, headaches, sleep, mood. Include specific examples, like getting lost on a familiar drive or missing bills because you forgot them. Accuracy cuts both ways, so don't exaggerate. Just don't leave things out.

For more on records, opinions, and organizing it all, see my guide on how to gather medical evidence for your VA claim.

What to Expect at Your C&P Exam

Your initial TBI exam will likely be with a specialist. According to one veterans law firm's overview, that's typically a neurosurgeon, neurologist, psychiatrist, or psychologist.

The exam follows the same structure as the rating table. The examiner works through the TBI DBQ and asks about each area of function, from memory and judgment to communication and subjective symptoms. If you've read the rating criteria, the questions will feel familiar, because they are the rating criteria.

The examiner also has to judge which symptoms come from your TBI and which might come from something else. VA's own examiner training material describes determining the cause of residual symptoms as "a complex issue" that requires ongoing training. It's a real medical judgment, which is one more reason your evidence and your description should be clear.

A few practical tips:

Answer for your typical days and your bad days. If your memory is fine some mornings and gone by afternoon, say so.
Cover every area. As the client story above shows, the area you skip might be the one that decides your rating.
Bring your notes. It's hard to remember your memory problems on the spot. A written list helps.
Consider bringing someone. A spouse or friend may notice changes you don't.

For scheduling, rescheduling, contractor exams, and DBQ basics, see what to expect at your VA claim exam.

Common Reasons TBI Claims Are Denied

Most TBI denials and low ratings come back to the same few gaps. Here's what to watch for:

No record of the in-service event: If nothing was written down at the time, VA may question whether the injury happened. Buddy statements, family statements, and service records that place you at the event can fill that gap.
No nexus: VA may agree you have symptoms but not that they came from your in-service injury. A detailed medical opinion that reviews your records and explains the link is usually the fix.
Incomplete symptom reporting: If only your most obvious symptom gets described, the exam can miss the area that should control your rating. That's the lesson from the 0% to 70% example above.
Confusing the injury label with your current rating: A "mild TBI" note in your records describes the injury, not your residuals. If a decision leaned on the label instead of your current symptoms, that's worth challenging.
A flawed exam: If the examiner didn't review your records, skipped areas of function, or gave an opinion with no reasoning, you may have grounds for a Higher-Level Review or a Supplemental Claim with new evidence.

For the review options and how to pick between them, see the most common reasons VA claims get denied.

Secondary Conditions Linked to TBI

TBI is usually the starting point in a chain of conditions, not the end of one.

Conditions secondary to TBI:

Presumptive conditions: Parkinsonism, unprovoked seizures, certain dementias, depression, and hormone deficiency diseases, within the windows listed above.
Headaches and migraines: Commonly claimed after TBI. If your headaches are diagnosed as migraines, they may be rated under their own code instead of as a TBI subjective symptom.
Sleep problems: Often claimed secondary to TBI. You'll need a diagnosis and a nexus opinion.
Anxiety and other mental health conditions: As covered in the rating section, a diagnosed mental health condition is generally rated separately from the TBI, with care taken not to count the same symptoms twice.

For any condition not on the presumptive list, plan on getting a nexus opinion that explains how your TBI caused or worsened it.

What TBI is secondary to: In most cases, nothing. TBI usually comes directly from an in-service event. But that same event often causes other injuries, like a back injury from a vehicle accident or tinnitus from a blast. If you're filing for those injuries, list the TBI too. They share the same event, and that event evidence supports all of them.

When TDIU May Apply

TDIU, or Total Disability based on Individual Unemployability, pays at the 100% rate when your service-connected conditions keep you from holding a "substantially gainful occupation," even though your combined rating is lower. It's set out in 38 CFR 4.16. The regulation also says that marginal employment doesn't count as substantially gainful employment.

How TDIU fits a TBI claim depends on your ratings:

A 100% TBI rating doesn't need TDIU, because it's already paid at the total rate.
A 70% TBI rating alone meets the schedular threshold of one condition rated 60% or higher.
A 40% TBI rating can qualify when it combines with other conditions, like depression, headaches, or seizures, to reach 70% or more. The general threshold is two or more conditions with one at 40% or higher and a combined 70% or higher.
Extraschedular TDIU is an option if you can't meet the numbers but your TBI residuals still keep you from working.

Cognitive residuals can be especially hard on employment. A job you could do physically may still be out of reach if you can't keep track of tasks, follow multi-step instructions, or handle conflict. Evidence from past employers about missed deadlines or jobs you couldn't keep is valuable here. For the full mechanics, see how TDIU eligibility works.

Conclusion

The biggest thing to take from this guide is that VA rates what your TBI looks like today, not the label it got at the time of injury. A "mild" injury on paper can still mean serious residuals now, and the rating system is built to measure those residuals area by area.

Because your worst area sets your rating, complete and honest reporting matters. Describe every area your TBI affects, back it up with statements from people who know you, and make sure a current evaluation is in your file. If your TBI is already service-connected, look at the presumptive list and ask whether any of those conditions apply to you.

A VSO, an accredited Veterans Service Officer who helps veterans file and appeal claims for free, is often my first suggestion to clients. Bring your service records, your symptom notes, and any buddy or family statements to that first meeting, and you'll be starting your claim with what VA needs to see.

Wondering how this applies to your condition? Every veteran's situation is a little different. Schedule a free consultation to talk through what you've read and get connected with a VSO who can help with your claim.

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Autumn Olsen