VA Disability for TBI (Traumatic Brain Injury): Ratings and Evidence (2026)

TBI Overview and Severity Levels

Traumatic brain injury is brain dysfunction caused by an external mechanical force - blast wave, blunt impact, penetrating injury, or rapid acceleration-deceleration. The Department of Defense and VA classify TBI into three severity levels based on injury characteristics:

• Mild TBI (concussion) - loss of consciousness 0-30 minutes, alteration of consciousness up to 24 hours, post-traumatic amnesia 0-1 day, normal structural imaging
• Moderate TBI - loss of consciousness 30 minutes to 24 hours, alteration of consciousness more than 24 hours, post-traumatic amnesia 1-7 days, with possible imaging findings
• Severe TBI - loss of consciousness more than 24 hours, post-traumatic amnesia more than 7 days, often with abnormal imaging findings

The classification refers to the injury event, not the long-term residuals. Many veterans with mild TBI have substantial chronic residual symptoms, and the rating depends on the residual functional impairment - not the severity classification at the time of injury.

In-Service TBI Mechanisms

Veterans sustain TBI through a wide range of in-service mechanisms:

• Blast exposure from IEDs, mortars, rockets, and grenades (the signature TBI mechanism for OIF/OEF veterans)
• Vehicle accidents (humvee rollovers, helicopter crashes, aircraft incidents)
• Falls from heights (parachuting, ship ladders, rappelling, helicopter inserts)
• Sports injuries during PT (boxing, combatives, contact sports)
• Direct blows during training accidents or combat
• Subconcussive blast exposure from breaching, heavy weapons, artillery, and demolitions training

Documentation of in-service TBI is sometimes thin - many concussions were never formally reported, and the post-event medical evaluations were sometimes brief. Service treatment records, unit after-action reports, MACE (Military Acute Concussion Evaluation) documentation, buddy statements, and post-service medical records together can build the in-service event picture.

The DC 8045 Ten-Facet Framework

TBI is unique in the VA rating schedule. Diagnostic Code 8045 evaluates "residuals of TBI" not by a single percentage but by ten functional facets. Each facet is rated on a scale of 0, 1, 2, 3, or "total." The facets are:

The Highest-Facet Rule

The TBI rating is determined by the highest single facet rating. The conversion table:

• Highest facet rated 0 → 0% TBI
• Highest facet rated 1 → 10% TBI
• Highest facet rated 2 → 40% TBI
• Highest facet rated 3 → 70% TBI
• Any facet rated "Total" → 100% TBI

This is unusual. In most other rating frameworks, multiple impairments combine to a higher overall rating. With TBI, only the highest facet matters for the TBI percentage itself. That makes the assessment of each facet critically important - a veteran with multiple level-2 facets is rated at 40% under TBI alone, the same as a veteran with only one level-2 facet.

Separately Rated Comorbid Conditions

Note 1 to DC 8045 directs raters to separately evaluate any condition that has its own diagnostic code, even when it is part of the TBI residuals. This Note is one of the most important provisions in TBI rating practice. Conditions commonly rated separately include:

• Migraines - rated under DC 8100 at 0/10/30/50 percent based on frequency and severity of prostrating attacks
• PTSD or other mental health conditions - rated under 38 CFR 4.130
• Major depressive disorder, anxiety disorders - separate mental health diagnoses
• Vestibular dysfunction (Meniere's-like, BPPV, labyrinthitis) - rated under 38 CFR 4.87
• Tinnitus - rated under DC 6260
• Hearing loss - rated under 38 CFR 4.85
• Seizure disorders - rated under DC 8910 (grand mal) or 8911 (petit mal)
• Sleep disorders not separately attributable - sometimes rated under DC 6847 if sleep apnea, or under specific sleep disorder codes
• Speech and language disorders - rated separately under 38 CFR 4.124a

For each condition, separate service connection and rating require its own diagnosis, supporting evidence, and where applicable, a nexus letter linking the condition to the TBI.

Evidence That Strengthens the Claim

• Service treatment records of the in-service TBI event - blast exposure documentation, MACE/post-blast assessment, post-event medical evaluation
• Unit records, after-action reports, awards documenting the qualifying event
• Witness statements from fellow service members
• Post-service neuropsychological testing - validated cognitive measures showing residuals (memory, attention, executive function, processing speed)
• Brain imaging - MRI, CT, and where available DTI (diffusion tensor imaging) for axonal injury
• Neurologist or neurosurgeon evaluations
• VA TBI screening results (the VA mandatorily screens post-9/11 veterans for TBI)
• Buddy and family statements describing observed cognitive and behavioral changes since service
• Treating clinician statements addressing each facet of residual function
• Nexus letter when in-service event documentation is thin or service connection is contested

Secondary Conditions Arising From TBI

Beyond the conditions separately rated under Note 1, additional secondary claims arise downstream of TBI:

• Major depressive disorder secondary to TBI - depression rates are substantially elevated post-TBI
• Anxiety disorders secondary to TBI
• Substance use disorders - sometimes claimed as secondary when they developed post-TBI as self-medication
• Sleep apnea secondary to TBI - autonomic dysregulation and weight gain pathways
• Falls and orthopedic injuries secondary to TBI - balance impairment leading to falls
• Erectile dysfunction secondary to TBI - both neurological and psychological pathways
• GERD secondary to TBI - autonomic and medication-related pathways

Each secondary claim requires a nexus letter under 38 CFR 3.310 articulating the medical pathway from the service-connected TBI to the secondary condition.

When a Nexus Letter Helps

For TBI claims with documented in-service events and clear post-service neuropsychological findings, a nexus letter is not always required. A nexus letter becomes valuable when:

• The in-service TBI event is poorly documented and the link to current symptoms needs articulation
• The veteran had multiple subconcussive blast exposures rather than a single documented concussion
• The post-service neuropsychological findings need to be tied specifically to the TBI rather than other causes
• A C&P examiner has reached a contrary conclusion that needs to be addressed
• The claim is for a secondary condition arising from TBI

A strong TBI nexus letter typically:

• Identifies the in-service event(s) - blast exposure, vehicle accident, fall
• References service records, unit reports, and any contemporaneous documentation
• Cites post-service neuropsychological testing results
• Explains the mechanism of TBI from the in-service event to the current residuals
• References the medical literature on blast TBI, repetitive subconcussive injury, or the specific mechanism
• Uses the "at least as likely as not" phrasing
• For secondary claims, articulates the pathway from TBI to the secondary condition

Common Mistakes

• Failing to claim each separately ratable condition. The single TBI rating alone is often substantially below the combined rating that includes migraines, PTSD, vestibular dysfunction, and other distinct conditions.
• Under-reporting subjective symptoms during the C&P exam. The 10-facet framework relies heavily on patient-reported symptoms; minimizing them lowers the rating.
• Skipping neuropsychological testing. Validated cognitive measures often reveal deficits that the veteran has compensated for in daily life but cannot mask in formal testing.
• Conflating PTSD and TBI. The two conditions have overlapping symptoms but are distinct diagnoses with separate ratings - the C&P examiner's job is to differentiate them, and both can be service-connected simultaneously.
• Missing the secondary depression or anxiety claim. Mental health conditions frequently develop post-TBI and are commonly under-claimed.