Requires an individual or group health insurance policy providing prescription drug coverage to permit and apply a prorated daily cost-sharing rate to certain prescriptions.

Prohibits an individual or group health insurance policy providing prescription drug coverage from: (1) Denying coverage for the dispensing of a drug prescribed for the treatment of a chronic illness that is made in accordance with a plan to synchronize the refilling of multiple prescriptions for the insured; and

(2) Using payment structures incorporating prorated dispensing fees determined by calculation of the days' supply of medication dispensed.