Medicare+Choice Mental Health Coverage Access Assurance Act of 1998

Medicare+Choice Mental Health Coverage Access Assurance Act of 1998 - Amends title XVIII (Medicare) of the Social Security Act with regard to the Medicare+Choice program to provide for inclusion of: (1) any attempt or threat to inflict injury to self in the definition of emergency medical condition; (2) mental health in the coordination of post-stabilization care of an enrollee; (3) information on hospitalization, outpatient, and drug coverage available for treatment of mental illness and addiction disorder under the original Medicare fee-for-service program option; and (4) mental illness treatment services and expenditures in information on utilization restrictions. Requires a Medicare+Choice organization offering a Medicare+Choice plan to provide access to appropriate mental health (as well as physical health) providers, including credentialed specialists, for medically necessary treatment and services, including inpatient psychiatric hospital services.