When you file a personal injury claim, the insurance provider will scrutinize your medical history for pre-existing conditions and may delay or deny benefits. A car accident lawyer might be your best resource for seeking compensation, but there are several things to be aware of:nFull disclosure: Do not withhold any information when discussing your case with your lawyer. They will need to know when you were originally diagnosed and any other pre-existing conditions that might apply.nnHave detailed medical records: It is vital to have documentation regarding your pre-existing PTSD and current diagnosis.nnFollow the doctor’s orders: Your mental health provider may be able to share information about how the recent car accident exacerbated your PTSD. Attend therapy sessions and take prescribed medications to show that your condition is legitimate – and that you are doing everything possible to heal.