Medicaid and the Children's Health Insurance Program cover influenza vaccinations for beneficiary children nationwide, according to the Centers for Medicaid and Medicare Services. Adult vaccination coverage varies on a state-by-state basis, but the majority of states cover some vaccinations, according to Medicaid.gov.
Adult vaccines may not be up to the standards of the Advisory Committee on Immunization Practice, while children receive vaccines recommended by the committee, according to Medicaid.gov. Medicare has covered influenza vaccinations since 1993. Medicare covers both the cost and administration of the vaccine, and beneficiaries receive the treatment for no out-of-pocket cost, according to the Centers for Medicaid and Medicare Services.