No independent review organization or clinical reviewer working on behalf of an independent review organization or an employee, agent or contractor of an independent review organization shall be liable in damages or otherwise to any person for any opinions rendered or acts or omissions performed within the scope of the organization’s or person’s duties under the law during or upon completion of an external review conducted pursuant to this chapter unless the opinion was rendered or act or omission performed in bad faith or involved gross negligence; provided that the health carrier shall not be liable in damages or otherwise to any person for any opinions rendered or acts or omissions performed by the independent review organization, its employees, agents or contractors within the scope of the organization’s or person’s duties under the law during or upon completion of an external review conducted pursuant to this chapter.