As used in sections 376.395 to 376.404 the following terms shall mean:
(1) "Group policy", a group health insurance policy issued by an insurance company and a group contract issued by a health service corporation, a health maintenance organization or a similar corporation or organization;
(2) "Group policyholder", the entity purchasing the group policy from the insurer;
(3) "Individual policy" or "converted policy", an individual health insurance policy issued by an insurance company or an individual health services contract issued by a health service corporation, a health maintenance organization or a similar corporation or organization;
(4) "Insurer", the entity issuing a group policy or an individual or converted policy;
(5) "Medicare", Title XVIII of the United States Social Security Act as added by the Social Security Amendments of 1965 or as later amended or superseded;
(6) "Premium", any premium or other consideration payable for coverage under a group or individual policy.