After reviewing your claim, your insurance adjuster may deny your car accident claim for several reasons, including the following:nYour insurer determined that you were at fault. This is one of the most common reasons an insurance provider will deny a claim. If there is evidence that you ran a red light, were tailgating, or said something that could be interpreted as an admission of guilt, your claim may be denied.nnYou do not have relevant medical records. If you are seeking compensation for medical expenses associated with an injury caused by the accident, you will need to provide copies of medical records. If you cannot supply these documents, your insurance company will likely deny your claim based on a lack of evidence.