In most cases, no. Releasing your medical records could prejudice your claim if they are taken out of context and not properly presented to the insurance company. For example, if your wrist was sprained in the accident and you sign a medical record release, the opposing insurance company could find that your wrist was broken five years ago and discredit the pain you’re experiencing now by claiming it’s a pre-existing injury. You need an attorney who knows how to work with doctors in order to put your medical records in the proper and truthful light.
Medical record releases should only be signed in very select circumstances, and always after you have spoken with an experienced car accident lawyer.