Health insurance; ethics and fairness in carrier business practices; downcoded claims. Prohibits a carrier, intermediary, administrator, or representative of a carrier from downcoding a claim, as defined in the bill, unless the decision to downcode is reviewed by a licensed physician, advanced practice registered nurse, or physician assistant. The bill requires a carrier, intermediary, administrator, or representative that downcodes a claim to provide certain notice to the person submitting the claim, including the reason for the decision and the process to appeal.