A prior back injury, arthritis diagnosis, or earlier treatment does not automatically defeat a California injury claim. It does require a careful comparison. The relevant question may be whether the new incident caused a different injury, made an existing condition worse, or did neither. Accurate medical history is central to that analysis.

Aggravation is different from compensation for an old condition

Judicial Council CACI No. 3927 distinguishes a condition that existed before the defendant’s conduct from the worsening caused by that conduct. The instruction recognizes compensation for the effect of wrongful conduct on a preexisting condition. It does not make another person responsible for every symptom or expense that would have existed anyway.

The evidence must connect the claimed change to the incident. A diagnosis appearing in an older record does not by itself establish the extent of symptoms before the accident. Conversely, feeling worse afterward does not automatically establish medical causation. The history, examination, imaging when appropriate, and other evidence must be evaluated together.

Describe the actual baseline

  • What symptoms existed before the incident, and how often did they occur?
  • What treatment or medication was already being used?
  • Were there existing work or activity restrictions?
  • What activities could you perform before the accident?
  • When did the new or increased symptoms appear?
  • Did another event or change in treatment affect the same condition?

Preserve relevant earlier records

Earlier treatment notes, diagnostic studies, prior work restrictions, and records of improvement can help establish the baseline. Keep records from the new incident in chronological order. A comparison may show a different symptom pattern, additional functional limitation, or a return of symptoms after a period of improvement.

Tell your treating providers about relevant prior conditions and previous accidents. Do not withhold an old injury because you fear it will weaken the claim. If a record is inaccurate, discuss the specific error with the provider and preserve any properly issued correction. Do not edit medical records yourself or ask that unfavorable history be removed.

Function can provide useful context

Specific examples are more informative than saying that you were “perfectly healthy” when prior records show ongoing treatment. You might have been receiving care yet still working full shifts or walking a particular distance. Describe those facts accurately and identify records or witnesses that can support them.

Record both worsening and improvement after the accident. A good day does not necessarily establish complete recovery, and a difficult day does not establish permanent disability. Avoid converting occasional symptoms into a constant limitation or attributing a medical conclusion to a clinician who did not make it.

Responding to an insurer’s prior-condition argument

Ask which records and medical reasoning support the insurer’s position. Separate an assertion that the condition existed from an assertion that the accident did not change it. Relevant prior history should be evaluated in context, not reduced to a single phrase taken from a chart.

Medical opinion may be needed to distinguish natural progression from accident-related aggravation and to address future care. There is no universal percentage assigned simply because a claimant had a prior injury. The available proof and the applicable legal standards determine the analysis.

Should you sign a broad medical authorization?

Review the providers, time periods, records, and scope requested. Relevant history may need to be disclosed through appropriate procedures, but that does not mean every unrelated medical record is automatically material. Have the specific authorization or discovery request reviewed rather than hiding relevant information or granting unrestricted access without understanding it.

Primary source

Judicial Council CACI No. 3927, reproduced by Justia.

Discuss the facts of your claim

Weiss Attorneys can review the records and the legal questions raised by your situation. Learn about our related injury representation and this related claim guide.

Read Scarlett Farrokh’s attorney profile, request a consultation, or call (213) 583-0977. This article provides general California information. The applicable duties, deadlines, and available remedies depend on the particular facts.