PROVIDES RELATIVE TO PRESCRIPTION DRUG PRICING: Requires certain health insurance issuers to notify enrollees that they are subject to an excess consumer cost burden when they are charged more for a prescription drug than their insurer pays or would pay after considering drug rebates from the drug manufacturer into the total cost of the drug. Requires health insurers to annually make available to the commissioner of insurance information regarding the value of rebates expressed as a percentage that the insurer made available to enrollees at the point of sale. In complying with the provisions of this Section, a health insurance issuer shall not publish or otherwise reveal information regarding the actual amount of rebates the health insurance issuer receives, including but not limited to information regarding the amount of rebates it receives on a product-, manufacturer-, or pharmacy-specific basis. Such information is a trade secret and shall not be disclosed.