Requires specified individual health insurers, group insurers, HMOs, & their pharmacy benefit managers to apply payments for prescription drugs by or on behalf of insureds & subscribers toward total contributions of insureds’ & subscribers’ cost-sharing requirements; requires specified individual health insurers, group insurers, & HMOs to disclose on their websites & in their policies, certificates, & contracts their applications of payments by or on behalf of policyholders, insureds, & subscribers toward policyholders’, insureds’, & subscribers’ total contributions to cost-sharing requirements.