INS CD-SYNCHRONIZE MEDICATION. Amends the Illinois Insurance Code. Provides that all entities providing prescription drug coverage shall permit and apply a prorated daily cost-sharing rate to prescriptions that are dispensed by a pharmacy for less than a 30-day supply if the prescriber or pharmacist indicates the fill or refill could be in the best interest of the patient or is for the purpose of synchronizing the patient’s chronic medications. Provides that no entity providing prescription drug coverage shall deny coverage for the dispensing of any drug prescribed for the treatment of a chronic illness that is made in accordance with a plan among the insured, the prescriber, and a pharmacist to synchronize the refilling of multiple prescriptions for the insured. Provides that no entity providing prescription drug coverage shall use payment structures incorporating prorated dispensing fees determined by calculation of the days’ supply of medication dispensed. Provides that dispensing fees shall be determined exclusively on the total number of prescriptions dispensed. Establishes criteria for an entity conducting audits (either on-site or remotely) of pharmacy records.