electronic processing of health insurance claims and payment data; verification of health care plan coverage; verification of patient eligibility for health care plan benefits; verification of benefit determinations under health care plans; electronic transfer of patient medical and administrative information, including enrollment status of employees of insured organizations, between health care plan participants defined as health care providers, pharmacists, health insurance organizations, government agencies involved in administration of health care, and insured organizations offering health care plans to employees

verification of medical providers' credentials; providing drug interaction data to health care plan participants; electronic transfer of patient medical and administrative information between health care plan participants