What evidence should I submit?

For your TBI increase claim, you must submit new, objective medical evidence documenting the worsening of your condition since your last rating decision, as the VA will compare this new evidence to the prior evidence that established your current rating per 38 CFR 3.105(e). The most critical evidence is a current, comprehensive medical opinion from a neurologist, psychiatrist, or neuropsychologist that includes a detailed examination assessing all facets of your TBI residuals (e.g., cognitive, emotional, behavioral, and physical). This report should specifically address the severity of your symptoms and link them to functional impairment, as ratings for Mental Disorders (including those due to TBI) are assigned under Diagnostic Code 9304 and evaluated under the criteria in **38 CFR 4.130**, which requires demonstrating occupational and social impairment. You should also submit all relevant treatment records, clinical notes, and results from any new neuropsychological testing or brain imaging (like MRIs or CT scans). While your personal and buddy statements are vital for describing the real-world impact, they are not a substitute for medical evidence. Your actionable next step is to formally request your private treatment records and schedule a thorough examination with a specialist who can author a nexus statement detailing your decline; submit this evidence using a **VA Form 21-4138** to ensure it's associated with your pending claim. Note that in *DeLuca v. Brown*, the Court held that the VA must consider the severity of a disability during flare-ups, so ensure your evidence captures your symptoms at their worst. **Disclaimer: This is educational information for claims preparation and is not intended as legal or medical advice; for guidance specific to your case, please consult with an accredited VA attorney or claims agent.**