You can choose to refuse treatment, however you will want to discuss your concerns with your doctor before taking action, as this might not be in your best interest. The insurance company could stop paying benefits and claim you're not cooperating with plans for your recovery. Alternatively, you are also entitled to a second opinion about further treatment if you disagree with your physicians' treatment recommendations. If that is the case, you should communicate these issues with your attorney and see if they can assist you with finding a different primary treating physician.