Health care coverage: cost sharing. Existing law generally prohibits a person who manufactures a prescription drug from offering in California any discount, repayment, product voucher, or other reduction in an individual’s out-of-pocket expenses associated with the individual’s health insurance, health care service plan, or other health coverage, including, but not limited to, a copayment, coinsurance, or deductible, for any prescription drug if a lower cost generic drug is covered under the individual’s health insurance, health care service plan, or other health coverage on a lower cost-sharing tier that is designated as therapeutically equivalent to the prescription drug manufactured by that person or if the active ingredients of the drug are contained in products regulated by the federal Food and Drug Administration, are available without prescription at a lower cost, and are not otherwise contraindicated for the condition for which the prescription drug is approved. Existing law, the Knox-Keene Health Care Service Plan Act of 1975, provides for the licensure and regulation of health care service plans by the Department of Managed Health Care, and makes a willful violation of the act a crime. Existing law provides for the regulation of health insurers by the Department of Insurance. This bill would require a health care service plan, health insurance policy, or pharmacy benefit manager that administers pharmacy benefits for a health care service plan or health insurer to apply any amounts paid by the enrollee, insured, or another source pursuant to a discount, repayment, product voucher, or other reduction to the enrollee’s or insured’s out-of-pocket expenses toward the enrollee’s or insured’s overall contribution to any out-of-pocket maximum, deductible, copayment, coinsurance, or applicable cost-sharing requirement under the enrollee’s or insured’s health care service plan contract or health insurance policy. The bill would limit the application of the section to health care service plans and health insurance policies issued, amended, delivered, or renewed on or after January 1, 2025. Because a willful violation of these requirements by a health care service plan would be a crime, this bill would impose a state-mandated local program.