The Oregon Immunization Program (OIP) is committed to ensuring and increasing access to vaccines for people of all ages. OIP has a Vaccine Access Program that allows providers to enroll to receive state-supplied vaccine to serve their entire population. All vaccine is supplied at no cost, and providers code each dose of vaccine given to show the eligibility for that vaccine and that patient. Eligibility codes in ALERT IIS are used to send quarterly bills for patients who are insured, and the participating clinics do not need to purchase a separate stock of private vaccine for these patients.