Providing services to employer-sponsored and employer self-insured health benefit plans, independent health benefit plans, health maintenance organizations, disability and workers compensation carriers, Taft-Hartley Trust Funds for health benefits, third-party health plan administrators, health benefit consulting firms, preferred provider health plans, and health care management organizations, namely, health insurance claims administration and administration of pre-paid health care plans for health care organizations providing benefits that include services and equipment for patients requiring durable medical equipment, orthotics and prosthetics, intravenous therapy, respiratory therapy and medical supplies