A diffuse axonal injury, or DAI, is among the hardest brain injury claims to prove in California. The reason has nothing to do with how serious the injury is. These claims get valued as minor because the emergency room scan came back clear.
For families pursuing California traumatic brain injury claims, that gap is the whole problem. The person’s life has visibly changed, but the file meant to prove it starts with an unremarkable scan. Closing that gap takes a record built on purpose, starting in the first weeks after the crash.
Key Takeaways:
- A clear initial scan does not, by itself, establish that no significant brain injury occurred.
- These claims are commonly undervalued because the strongest proof sits outside the emergency room file.
- Employment records, payroll history, and accounts from family and coworkers often document the change more plainly than any single medical record.
- California personal injury claims generally must be filed within two years, though a delayed-onset injury can complicate when that period starts.
- Claims against a public entity carry a much shorter presentation deadline.
- A person who cannot recall the collision is at a real disadvantage when fault is disputed.
What Is a Diffuse Axonal Injury Claim?
A diffuse axonal injury claim is a traumatic brain injury claim brought where the injury does not announce itself in the emergency record. There is no fracture and no bleed for an adjuster to point to. The case rests instead on what the record shows about the person’s life before and after.
That changes how the claim has to be built. In a broken-bone case the injury is established and the argument is about value. Here, the existence of the injury is what gets contested.
The practical result is that the work starts earlier and reaches further. We gather employment files, payroll history, and witness accounts while treatment is still underway.
Why Do These Claims Get Undervalued?
The proof that matters most is rarely in the file when the claim is first evaluated. An early record reflects a single visit, while the effects of the injury emerge over months.
Anyone reviewing the claim early sees the thinnest version of it. That is not a judgment about the injury. It is a consequence of when the file gets read.
We build the record forward from the first treatment date so it reflects how the claim actually developed. That means requesting records on a schedule rather than waiting for a demand deadline to force the issue.
Part of the work is stopping evidence from disappearing. We send preservation demands for vehicle data, surveillance footage, and employer records in the first weeks of a case, before the parties holding them purge those files on their normal schedules.
Accidents That Lead to These Claims in Northern California
Motor vehicle collisions account for most of the DAI claims we take on. In this region that usually means Interstate 5 or Highway 299. Commercial truck collisions on the freight routes through Shasta County produce a large share of the severe ones.
The rest come from falls and workplace incidents, where the liability framework changes even though the claim looks similar. These are the leading causes of traumatic brain injury we see:
- High-speed car crashes
- Motorcycle wrecks
- Pedestrian-vehicle collisions
- Large commercial truck accidents
- Bicycle and e-scooter crashes
- Falls from roofs or balconies
- Falls from ladders or scaffolding
- Falls down stairwells
- Falls at construction sites
- Falls on unsafe property
Each of these produces a different investigation even when the injury is the same. A collision case turns on CHP reports, scene evidence, and vehicle data, while a premises case turns on maintenance records and a product case turns on the manufacturer’s design history.
For California traumatic brain injury claims, the investigation has to address both liability, meaning who is legally responsible, and the full consequences of the injury. Reiner & Frankel, LLP has built catastrophic injury cases from our Redding office for more than 40 years. Our attorneys bring over 150 years of combined trial experience to these matters.
How Long Do You Have to File a California Brain Injury Claim?
Most California personal injury claims must be filed within two years of the date of injury under Code of Civil Procedure § 335.1. Missing that deadline generally ends the claim. The strength of the evidence does not change that.
These claims complicate the calculation more than most. When the effects of an injury are not apparent until well after the accident, California’s discovery rule can affect when the period starts to run. That question turns on the specific facts.
A different deadline applies when a public entity may be responsible, such as a dangerous roadway or a government vehicle. Those claims must first be presented under California’s Government Claims Act, which generally allows six months. If a public agency may share responsibility, call us before that window closes.
Comparative Fault When the Injured Person Cannot Recall the Crash
California follows pure comparative negligence. An injured person can recover damages even when partly at fault, with the award reduced by their percentage of responsibility rather than barred. That rule appears in CACI No. 405.
The rule creates a specific disadvantage here. A person who cannot recall the collision cannot give their own account of it, which leaves the other driver’s version standing unopposed.
We treat the fault investigation as seriously as the injury for that reason. CHP collision records, scene photographs, vehicle data, and independent witness accounts have to carry the account the injured person cannot give.
Identifying Every Responsible Party
The driver who caused a collision is rarely the only party with exposure. When that driver was working at the time, their employer can be responsible for the same conduct, which usually means a commercial policy rather than a personal one.
That distinction matters more in these claims than in most. Future care and lost earning capacity in a serious brain injury case can exceed a personal auto policy several times over, so the size of the available coverage often decides what a family actually recovers.
Other parties can enter the case depending on the facts. A vehicle manufacturer where a safety system failed, a property owner where a fall occurred, a contractor responsible for a work site, or a public agency responsible for a roadway can each carry independent exposure.
We identify every potentially responsible party before filing rather than after. Adding a defendant later runs into the same filing deadlines that governed the original claim, and by then the evidence supporting that theory is often gone.
What Damages Can a California Brain Injury Claim Recover?
California Civil Code § 3333 entitles an injured person to compensation for all the harm proximately caused. That harm falls into two categories, and these claims weight them differently than most injury cases.
Economic damages cover losses with a dollar figure attached. Past and future medical care, lost income, and reduced earning capacity all belong here. Non-economic damages cover what carries no invoice, including pain, loss of enjoyment of life, and loss of independence.
The future economic side is where these claims are won or lost. Someone who cannot return to the work they trained for may face decades of reduced income, and someone needing ongoing support may face costs that dwarf everything already spent.
Proving those future costs takes work unrelated to the emergency room file. A life care planner projects what ongoing support will cost across a normal lifespan, a vocational evaluator assesses what work remains realistic, and an economist reduces both to present-day figures.
California places no general cap on either category in a standard injury claim. The limits that exist apply to specific case types, which is one reason identifying the right defendant early affects what a claim can ultimately recover.
What Evidence Can Help Prove a DAI Claim?
No single document tells the whole story in these cases. We examine medical records, accident evidence, witness statements, and employment records together, because each one answers a question the others cannot.
Medical Records
Medical records establish what was documented immediately after the accident and how the file developed from there. Treatment records, follow-up evaluations, rehabilitation notes, and treating physician opinions all contribute.
Sequence matters more than any single entry. A record that begins with an unremarkable visit and builds over months tells a different story than the first entry alone.
Family and Functional Evidence
Family members supply what a chart cannot. They see the difference in daily routines, in conversations, and in the tasks a person used to handle without thinking about them.
Work records supply the rest. Performance reviews, attendance records, and payroll history from before and after a collision often show the change more plainly than any medical note, and they carry the weight of documents the employer created for its own reasons.
TBI Case Results and Types
When reviewing TBI case results and types, look past the name of the injury and at what each claim had to establish. Two claims carrying the same diagnosis can look nothing alike once occupation, age, earning history, and future care needs enter the calculation.
That is why comparing your situation to a published figure rarely helps. A claim for someone in their thirties who cannot return to skilled work carries decades of reduced earning capacity. The same diagnosis in someone already retired produces a very different economic picture.
We have recovered more than $600 million for clients across Northern California over more than 40 years of practice. Results may vary. Prior case outcomes do not guarantee similar results.
FAQs: Diffuse Axonal Injury
These are the questions families ask most often when the early records do not reflect what they are living with.
What if the adjuster points to the clear initial scan?
That argument is common and it is not the end of the claim. The relevant question is what the complete record shows across months of treatment, employment history, and daily life. We build the file so the answer already exists before the argument gets made.
Should I give the insurance company a recorded statement?
You are generally not required to give a recorded statement to another driver’s insurer. There is rarely a reason to give one early, because an account given before the full record exists can later be used to suggest the person is unreliable. We handle those communications instead.
Can a claim include the cost of care I have not received yet?
A claim may include reasonable future care costs when the evidence shows ongoing support will be necessary. That figure usually comes from a life care plan projecting costs over a lifetime, adjusted to present value. Treatment recommendations and professional assessments establish what those costs will be.
Does a prior head injury prevent a claim for a new one?
A prior injury does not bar a claim for a later one. What matters is the documented condition before the new accident, what changed afterward, and what the records show about the connection. We assemble both sets of records rather than treating a prior injury as an obstacle.
What should someone do if doctors disagree about the extent of a brain injury?
The patient should continue working with appropriate medical professionals regarding diagnosis and treatment. From a legal perspective, obtaining and preserving the relevant medical records and imaging can help a lawyer understand the differing opinions and evaluate whether additional medical review may be appropriate.
What does it cost to bring a claim like this?
We handle these cases on a contingency-fee basis, so you pay no attorney fees unless we recover compensation for you. Case costs, including record retrieval and professional assessments, we advance rather than billing you along the way. That structure matters in brain injury cases specifically, because the work required to prove one is substantial.
How soon after an accident should a family call a lawyer?
Sooner than most people assume, and sooner than the filing deadline suggests. Vehicle data, surveillance footage, and employer records get overwritten on routine schedules measured in weeks, not years. The two-year filing period governs when a lawsuit must start, not how long the proof stays available.
Talk to a California Brain Injury Lawyer
A clear initial scan does not settle what happened to someone after a serious head trauma. For families pursuing California traumatic brain injury claims, the medical file is one part of a much larger record.
Reiner & Frankel, LLP investigates the accident, assembles the full record, documents the long-term consequences, and files in Shasta County Superior Court. Call (855) 248-5659 for a free case review.