For purposes of this article, a “program beneficiary” is any person whose income level is at or below 200 percent of the federal poverty level as adjusted annually. Program beneficiaries shall not be required to provide any copayment for services that are funded pursuant to this article, except that clinics may charge beneficiaries on a sliding fee scale for services, but no beneficiary shall be denied services because of an inability to pay. The department shall annually adjust this income standard to reflect any changes in the federal poverty level. Payment pursuant to this article shall be made only for services for which payment will not be made through any private or public third-party reimbursement.