Continuity of Care in Health Insurance Contracts; Requiring that contracts between a health insurer and a contracted health care practitioner require a specified notice; requiring a health insurer and a health care practitioner to allow certain policyholders to continue coverage and care for a specified timeframe; requiring that certain health maintenance organization contracts require a specified notice; requiring a health maintenance organization and a treating provider to allow certain subscribers to continue coverage and care for a specified timeframe, etc.