Health care management and coordination services for others, namely, management of health care personnel and activities related thereto; management and development of health care provider networks and contracts relating thereto, and management and administration of billing; preparation of health care management reports for others in the field of HMOs, PPOs, insurance companies, hospitals and other managed care organizations; distributorships in the field of durable and other medical equipment and products; product marketing services for others in the health care field; medical cost management, namely, managing costs to a patient of home health care services