(1) “Health service area” means an area designated by the secretary pursuant to section 1511 of title 15 of the public health services act, 42 U.S.C. § 300l, as a health service area.

  (2) “Health systems agency” means a conditionally or fully designated health systems agency for a health service area within this state designated pursuant to section 1515 of title 15 of the public health services act, 42 U.S.C. §§ 300l-4.

  (3) “Health systems plan” means a plan developed by a health systems agency pursuant to section 1513(b)(2) of title 15 of the public health services act, 42 U.S.C. §§ 300l-2.

  (4) “Institutional health services” means the health services provided through health care facilities and health maintenance organizations as defined under section 1122 of the social security act, 42 U.S.C. §§ 1320a-1, or under the state certificate of need program under Act No. 256 of the Public Acts of 1972, as amended, being section 331.451 to 331.462 of the Michigan Compiled Laws, and includes the entities in or through which those services are provided. The term does not include a Christian science sanatorium operated, or listed and certified, by the first church of Christ, scientist, Boston, Massachusetts.