31 Pa. Code § 145.2
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Contract-An insurance policy, subscriber agreement, certificate, plan or written agreement for or effecting insurance by whatever name called, including but not limited to clauses, riders or endorsements offered by a person or entity engaged in the business of insurance in this Commonwealth.
Department-The Insurance Department of the Commonwealth.
Insurer-An insurance company, association, reciprocal or interinsurance exchange, nonprofit hospital or professional health service plan, health maintenance organization, fraternal benefit society, beneficial association or other person, corporation, company, partnership, association or other entity acting as an insurer.
31 Pa. Code § 145.2