No contract between an insurer and a health care professional or health care provider may provide for recoupments in violation of this Section. Nothing in this Section shall be construed to preclude insurers, health maintenance organizations, independent practice associations, or physician hospital organizations from resolving coordination of benefits between or among each other, including, but not limited to, resolution of workers' compensation and third-party liability cases, without recouping payment from the provider beyond the 18-month time limit provided in this subsection (c).
215 ILCS 5/368d