CRSC and TBI: how the VA brain-injury rating maps to your claim

Information verified through October 8, 2026.

The short answer. VA rates the lasting effects of a traumatic brain injury (TBI) under Diagnostic Code 8045, and it does not give you one number for everything. Cognitive symptoms and other residuals not otherwise classified are rated on a single table, a diagnosed mental disorder is rated separately, and physical problems such as migraines, seizures, or balance disorders are rated under their own codes. For Combat-Related Special Compensation (CRSC), your military department reviews VA-rated conditions for a combat-related link, so those separate lines matter. The event behind the injury still has to be documented, and approval is never automatic.

How VA rates a TBI

The rating rules sit in 38 CFR § 4.124a, Diagnostic Code 8045, “Residuals of traumatic brain injury (TBI).” The regulation names three main areas of dysfunction: cognitive, emotional or behavioral, and physical. Each can need its own evaluation, and the rules say VA should not assign more than one evaluation for the same manifestations. Here is how the pieces split.

Area of impairment	How VA rates it
Cognitive, plus subjective symptoms and other residuals not otherwise classified	The 10-facet table in Diagnostic Code 8045. The result counts as one condition.
Emotional or behavioral	If a mental disorder is diagnosed, under 38 CFR § 4.130. If not, through the cognitive table.
Physical, including neurological	Under the appropriate diagnostic code, for example motor or sensory problems, seizures, or gait problems.
Distinct diagnoses such as migraine headaches	Separately under their own codes, even when the symptoms are subjective.

The ten facets are memory, attention, concentration and executive functions; judgment; social interaction; orientation; motor activity; visual spatial orientation; subjective symptoms; neurobehavioral effects; communication; and consciousness. Each facet is scored from level 0 up to level 3, or “total,” though not every facet has every level. The overall cognitive rating follows the highest facet: level 1 is 10 percent, level 2 is 40 percent, level 3 is 70 percent, and any facet at total is 100 percent.

One detail trips people up. When a medical record says “mild,” “moderate,” or “severe” TBI, that label describes the injury at or near the time it happened. The regulation says those terms do not determine the current rating. A veteran with a mild-concussion label in 2008 can carry a much higher residual rating today if the symptoms support it.

Why the split matters for CRSC

CRSC is paid by DFAS but decided by your branch of service, and it runs on VA-rated disabilities. Under 10 U.S.C. § 1413a, a disability must be combat-related, meaning it comes from a Purple Heart injury, direct armed conflict, hazardous service, conditions simulating war, or an instrumentality of war. Your branch looks at conditions one at a time. A VA decision that lists a cognitive rating, a migraine rating, and a separate mental health rating hands the branch three conditions to evaluate rather than one.

That is why a packet that only says “TBI” can leave conditions on the table. If the event record supports it, the migraines, the vestibular problems, and the cognitive residuals can each be presented as tied to the same event. We cover that approach on our CRSC for TBI page. Approval of one line does not guarantee approval of the others, and a residual that VA connected to something unrelated can be denied on its own.

The money side has a limit worth knowing. CRSC equals the lesser of the VA-rate value of your approved combat-related conditions or your waived military retired pay, and Chapter 61 medical retirees face a longevity cap. More approved conditions raise the first number, but they cannot lift the payment above the second. Run your own figures in the CRSC calculator, and see how CRSC is calculated for worked examples.

Proving the event when nothing was written down

Blast exposure is a leading cause of TBI in service, and the Department of Defense lists blast overpressure from combat, training, and weapons systems among the common causes. Many blasts never produced an incident report, especially during high-tempo deployments. Mild TBI is a concussion, a brief change in mental status or consciousness, so there may be no hospital stay to point to.

That does not end the claim, but it shifts the work to the evidence that does exist. Boards weigh documented events, so the packet usually leans on:

• Service treatment records, including any Military Acute Concussion Evaluation (MACE) screening, a sick-call entry, or a line-of-duty determination.
• Unit records such as casualty reports, after-action reviews, convoy or blast logs, and orders showing where your unit was.
• Award paperwork, especially a Purple Heart citation. We explain what the award does and does not settle in our Purple Heart guide.
• Statements from people who were there, which carry the most weight when they point to dates, places, and records rather than only describing symptoms.
• Medical continuity from the event to the diagnosis. A gap of years is not fatal, but the packet has to bridge it with records rather than assertion.

Be careful with mixed histories. If your file also shows a motorcycle crash or a sports concussion, the packet should say which event you are claiming and why. A branch that cannot separate a combat-related event from a civilian one may deny the whole line.

Which CRSC path a TBI event usually fits

How the injury happened	Category to look at	Read next
Blast from an enemy device or attack	Direct result of armed conflict, and possibly instrumentality of war	Armed conflict: what proves it
Rollover or crash in a military vehicle or aircraft	Instrumentality of war	Instrumentality of war examples
Breaching, live fire, hard airborne landing	Hazardous service or conditions simulating war	Hazardous duty and training that simulates war
Injury that earned a Purple Heart	Purple Heart path	Purple Heart explained

The category is a legal test, not a label. A blast in a combat zone does not make every later symptom combat-related. Your branch asks whether the specific condition resulted from the qualifying event.

Conditions VA links to TBI

Under 38 CFR § 3.310(d), VA presumes that certain illnesses are secondary to a service-connected TBI unless there is clear evidence otherwise. The list covers Parkinsonism including Parkinson’s disease and unprovoked seizures after moderate or severe TBI, certain dementias within 15 years of moderate or severe TBI, depression within 3 years of moderate or severe TBI or 12 months of mild TBI, and hormone deficiency diseases from hypothalamo-pituitary changes within 12 months of moderate or severe TBI. Claims outside those windows are decided under general service-connection rules.

Those are VA presumptions. They do not decide combat-relatedness at your branch. Whether a secondary condition can be tied back to the combat-related event is a separate question, and we walk through it in secondary conditions and CRSC. Mental health residuals raise the same questions covered in our PTSD guide.

What this means for military retirees

If you already receive CRSC for a TBI, pull your VA decision and check whether every separately rated residual appears in your approval. A line that VA rates but your CRSC approval never mentions may be worth a second look, and reconsideration or a request to add conditions is the usual route. See adding conditions after approval.

Timing is condition-specific. The effective date for each condition is the latest of the first full month after retirement, the first full month after VA service connection for that condition, or January 2008 for medically retired veterans. The Supreme Court’s decision in Soto v. United States (No. 24-320, June 12, 2025) ended the six-year limit on retroactive CRSC, and the Department of Defense rescinded its later application-date limits on May 14, 2026 and directed review of affected awards. Related cases, including Ploe v. United States and Carey v. United States, remain open, so we treat anything beyond the rescission as unsettled. For how that plays out, read CRSC effective date: one per condition.

What you should do now

1. Pull your VA rating decisions and code sheet and list every TBI-related line separately: the cognitive rating, any mental disorder rating, migraines, vestibular or balance conditions, seizures, and tinnitus.
2. Write down the event behind the injury in one paragraph: date, place, unit, and what happened.
3. Request your service treatment records and look for MACE screenings, sick-call visits, and line-of-duty paperwork.
4. Collect unit documents and contact people who were there, starting with those who can cite dates and records.
5. Separate any non-combat head injuries from the claimed event so the packet stays clear.
6. Start from your branch page for filing details: Army, Navy, Air Force, Marine Corps, Space Force, Coast Guard.

Frequently asked questions

The bottom line

A TBI claim is really a set of claims: one event and several VA-rated residuals. Knowing how VA splits the rating tells you what to list, and a clear event record tells your branch why each line is combat-related. Start with the VA decision, write down the event, and gather the records that place it.

Sources

• 38 CFR § 4.124a, Schedule of ratings, neurological conditions (Diagnostic Code 8045)
• 38 CFR § 3.310, Disabilities that are proximately due to, or aggravated by, service-connected disease or injury
• 10 U.S.C. § 1413a, Combat-related special compensation
• DoD Combat-Related Special Compensation program guidance
• Defense Health Agency Public Health, Traumatic Brain Injury
• NVLSP, Soto v. United States and Retroactive CRSC FAQs

This article is provided for general educational purposes and is not legal advice, financial advice, or a guarantee of CRSC eligibility, approval, effective date, or payment amount. Rules, guidance, and implementation procedures can change. Veterans should verify current requirements with their military department, DFAS, the Department of Veterans Affairs, or an appropriately accredited representative.