(a) The commission may suspend for up to three years or permanently terminate the right of any health care provider, including a provider of rehabilitation services within the meaning of section nine of this article, to obtain payment for services rendered to injured employees:
(1) If the commission finds that the health care provider is regularly providing to injured employees health care that is excessive, medically unreasonable or unethical, which shall include abusing the workers' compensation system in the treatment provided to injured employees or in its billing practices;