The following words and terms, when used in this subchapter, have the following meanings unless the context clearly indicates otherwise.(1) Insurer--Includes, but is not be limited to, all life, health, and accident companies; capital stock companies; mutual assessment life insurance companies; statewide mutual assessment corporations; county mutual insurance companies; local mutual aid associations; farm mutual insurance companies; mutual or natural premium life or casualty insurance companies; general casualty companies; Mexican casualty companies; Lloyds, reciprocal, or inter-insurance exchanges; nonprofit hospital, medical, or dental service corporations including, but not limited to, companies subject to the Insurance Code Chapter 842, as amended; stipulated premium insurance companies; fidelity, guaranty, and surety companies; title insurance companies; health maintenance organizations; and all other organizations, corporations, or persons engaged in the business of insurance, whether or not named previously; provided, however, these sections do not apply to any society, company, or other insurer whose activities are by statute exempt from the regulation of the department and which are entitled by statute to an exemption certificate from the department in evidence of their exempt status; nor to fraternal benefit societies.(2) Policy--Includes any insurance policy, plan, certificate or subscriber agreement, statement of coverage, binder, rider, endorsement, or application, if attached, offered by any person or entity engaged in the business of insurance or board-regulated prepaid services in this state.