(a) No group or blanket policy or contract of health insurance or certificate issued thereunder which is delivered, issued for deliver, or renewed in this State shall deny coverage, payment, or reimbursement for a National Coverage Determination Service on the basis that the service, item, test, or treatment is experimental or investigational. "National Coverage Determination Service" as used in this section shall mean a service, item, test, or treatment which has been determined to be covered nationally by the Secretary of the U.S. Department of Health and Human Services pursuant to the Social Security Act 1869 (f).