An insurer may not engage in any retaliatory action against an insured, including canceling or refusing to renew a health insurance policy, because the insured or a person acting on the insured's behalf has:

1. (1) filed a complaint against the insurer or against a preferred provider; or
2. (2) appealed a decision of the insurer.

Added by Acts 2003, 78th Leg., ch. 1274, Sec. 3, eff. April 1, 2005.