The 'Pre-Existing Condition' Trick: How Insurers Weaponize Your Medical History
By Dorukhan Korkut Oguz
If you have ever had a sore back, a bad knee, or any prior injury, expect the insurer to find it. One of the most common tactics is to argue that your pain is not from this accident at all, but from a "pre-existing condition." Done well, it can shrink or sink an otherwise strong claim. Done to you, it feels like being punished for having a history, which is everyone.
How the tactic works
After the accident, the insurer requests broad access to your medical records, often more than the claim requires. Then they comb for anything that lets them say:
- "This pain existed before."
- "You were already being treated for this."
- "The accident did not really change anything."
What the law actually says
Here is the part insurers rarely volunteer: in California, a careless party generally takes the victim as they find them. If an accident worsens a condition you already had, you can be compensated for that worsening. A prior injury does not erase a new one, and "aggravation" of an existing condition is a recognized harm.
The legal idea is sometimes called the "eggshell" principle: the fact that you were more vulnerable does not let the person who hurt you off the hook.
How to protect yourself
- Be honest about your history. Hiding a prior injury hands the insurer a credibility weapon when they find it anyway.
- Tell your doctors what changed. The key is the difference between before and after. Make sure your records reflect the new or worsened symptoms.
- Be careful what records you release. You generally do not have to hand over your entire medical life. The scope can and should be limited to what is relevant.
The takeaway
A pre-existing condition is not the end of your claim. It is a predictable argument with a well-established legal answer. If an adjuster is leaning on your history to deny or discount you, that is a sign to get advice, not to give up.