health, medical, dental, hospital, pharmaceutical and prescription drug insurance underwriting; administration and organizing of prepaid and preferred provider health, medical, dental, hospital, pharmaceutical, prescription drug plans and health savings accounts and similar accounts and related healthcare plans and networks; insurance claims administration and processing; providing eligibility and benefit information in insurance matters; insurance consultation in the nature of claims remittance advising; administering and underwriting health care coverage through contracted relationships with subscribers and professional clinical, hospital, nursing home and other health care providers