N.C. Gen. Stat. § 97-90.1

An insurer that covers an employee under a health benefit plan as defined in G.S. 58-3-167, a disability income plan, or any other health insurance plan is not a real party in interest and shall not intervene or participate in any proceeding or settlement agreement under this Article to determine whether a claim is compensable under this Article or to seek reimbursement for medical payments under its plan. The insurer that covers an employee under a health benefit plan as defined in G.S. 58-3-167 or any other health insurance plan may seek reimbursement from the employee, employer, or carrier that is liable or responsible for the specific medical charge according to a final adjudication of the claim under this Article or an order of the Commission approving a settlement agreement entered into under this Article for health plan payments for that specific medical charge. Upon the admission or adjudication that a claim is compensable, the party or parties liable shall notify in writing any known health benefit plan covering the employee of the admission or adjudication.