This subchapter applies to any insurer authorized to engage in business as an insurance company or to provide insurance in this state, including: (1) a stock life, health, or accident insurance company; (2) a mutual life, health, or accident insurance company; (3) a stock fire or casualty insurance company; (4) a mutual fire or casualty insurance company; (5) a Mexican casualty insurance company; (6) a Lloyd's plan; (7) a reciprocal or interinsurance exchange; (8) a fraternal benefit society; (9)