Yes, and these cases are exactly where objective testing matters most. Pre-existing conditions often overlap with post-concussive symptoms, which can make it difficult to determine what changed as a result of the accident versus what was already present.

Our evaluation process is built to address this directly:

• Detailed intake covering prior diagnoses, treatment history, and baseline functioning
• Testing that can help distinguish between pre-existing symptom patterns and new or worsened impairment
• Performance validity testing built into neuropsychological evaluation to support the credibility of the findings
• Documentation that addresses pre-existing conditions directly, rather than avoiding the issue

A prior diagnosis does not disqualify a client from a legitimate TBI claim. It just means the evaluation needs to account for baseline function, which is something our testing is specifically designed to do.