If you require immediate medical attention following an accident, you should go to the nearest emergency room for treatment. In non-emergency situations, you'll have to obey your state's laws regarding the proper ways to receive medical care. Certain states allow the employee to pick the physician who will treat them for their injuries, whereas other states provide employers that right. In Colorado, the employer or insurance company has the right to select the physician that employees must use for treatment of work-related injuries. This becomes your designated medical provider. While you must visit a designated doctor chosen by your employer or their insurer, you certainly have the right to get a second opinion.