Instead of trying to force your situation into a generic formula, focus on the evidence categories that usually shape negotiation:
1) Medical findings tied to the mechanism of injury
After a head impact, insurers look for a clinical “story” that matches the event—ER notes, concussion diagnosis, imaging when available, and follow-up evaluations.
Collect: emergency and urgent care records, neurology/primary care notes, discharge instructions, and any documented diagnosis of concussion, post-concussion syndrome, or related conditions.
2) Functional impact you can show
TBI damages are not only about pain—they’re about how symptoms interfere with daily life. In practice, that means documentation of memory problems, headaches, dizziness, sleep disruption, concentration issues, mood changes, and safety limitations.
Collect: work restrictions, return-to-work notes, therapy goals and progress reports, and any neurocognitive testing.
3) Financial records for losses tied to the injury
If you missed shifts due to symptoms, changed roles, or incurred out-of-pocket costs, those losses often matter.
Collect: pay stubs showing lost wages, mileage/transportation for appointments, prescription receipts, and invoices for assistive help or home care.
4) Consistency in the timeline
California claims often turn on credibility and continuity—how quickly symptoms were reported, whether treatment followed recommendations, and how symptoms evolved.
Collect: a chronological symptom log, appointment dates, and a simple timeline of when symptoms started, worsened, and improved.