Health insurance underwriting; health insurance claims processing; health insurance administration; health insurance case and utilization review and insurance claims adjustment services for healthcare purchasers and payors and providers and Medicare beneficiaries; providing information in the field of health insurance; organization and administration of health care benefit plans and health care service plans, namely, organizing pre-paid health care plans for others; insurance services, namely, claims administration of health care benefit plans and health care service plans; organization and administration of pre-paid health care plans; organization and administration of networks of preferred health care providers, namely, medical insurance case and utilization review and insurance claims adjustment services for healthcare purchasers and payors and providers and Medicare beneficiaries; pharmacy services, namely, pharmacy benefit management services