I have been seeing a lot of Form 63s being filed in new cases, with the "medical only" block (block "2." on the form) being checked. This does not give you as the injured worker any rights at all under the North Carolina Workers' Compensation Act. However, the insurance company will then try to "direct the medical treatment" in your claim, by sending you to doctors and other providers they choose, and pay for, even though they have no legal right to do that. Their legal right to "direct the medical care" only kicks in after they have accepted liability unconditionally for your injury, typically by filing a "Form 60" acceptance form.
So if you get hurt and they send you to the doctor and send you a Form 63 "medical only" please understand that you have no rights to work comp benefits at that time, and that the insurance company is actually taking advantage of you because you know no better. It is time to get a free consultation with a workers' comp lawyer if this happens to you.