Notice of change to provider agreement. Requires an insurer and a health maintenance organization to provide a contracted provider with a current reimbursement rate schedule: (1) every two years; and (2) when three or more CPT code rates change in a 12 month period. Requires an insurer and a health maintenance organization to provide a contracted provider with notice of a proposed material change to the agreement between the insurer or health maintenance organization and the contracted provider at least 90 days prior to the proposed effective date. Establishes requirements for the contents of a notice of a proposed material change. Requires an insurer or health maintenance organization to provide a contracted provider with notice at least 15 days prior to a change to an existing prior authorization, precertification, notification, referral program, edit program, or specific edits.