Establishes billing requirements for unanticipated medical billing and unanticipated coverage gaps of patients for out-of-network emergency services received from nonparticipating providers. Specifies the circumstances in which health care providers and facilities can bill health carriers and enrollees for health intervention services that are medical necessities. Requires the use of dispute resolution when a dispute exists as to the reimbursement of a nonparticipating provider. Takes effect on 7/1/2050. (HD1)