The performance of a gender transition surgery or the prescription or administration of cross-sex hormones or puberty-blocking drugs to an individual under eighteen years of age in violation of this section shall be considered unprofessional conduct and any health care provider doing so shall have his or her license to practice revoked by the appropriate licensing entity or disciplinary review board with competent jurisdiction in this state. 6. (1) The prescription or administration of cross72 sex hormones or puberty-blocking drugs to an individual under eighteen years of age for the purpose of a gender transition shall be considered grounds for a cause of action against the health care provider. The provisions of chapter 538 shall not apply to any action brought under this subsection. (2) An action brought pursuant to this subsection shall be brought within fifteen years of the individual injured attaining the age of twenty-one or of the date the treatment of the injury at issue in the action by the defendant has ceased, whichever is later.