Influenza Virus Vaccine and Administration

For additional influenza vaccine billing guidance, visit the Influenza and Pneumonia Billing webpage.

Billing Guidance

Report the appropriate influenza vaccine HCPCS/CPT code and administration code G0008 when administering a covered influenza vaccine. Medicare covers one influenza vaccination per influenza season for all Medicare beneficiaries. Additional vaccinations may be covered when medically necessary.

Report diagnosis code Z23 (Encounter for immunization) on influenza vaccination claims. Medicare waives both the deductible and coinsurance/copayment for covered influenza vaccinations.

When administering the vaccine in a patient's home, report M0201 for the additional in-home administration service. Report M0201 only once per date of service.

At a Glance

Requirement Information
Coverage All Medicare beneficiaries
Frequency Once per influenza season
Diagnosis Code Z23
Cost Sharing Deductible and coinsurance waived
Administration Code G0008
Home Administration M0201

HCPCS/CPT Codes

  • 90616, 90653, 90656, 90657, 90658, 90660, 90661, 90662, 90673 - Influenza Virus Vaccine (effective 8/05/2026 - 07/31/2027)
  • G0008 - Administration of influenza virus vaccine
  • M0201 - Additional administration of influenza vaccine inside patient's home; reported only once per date of service

Roster Billing

Mass immunizers may simplify claim submission by using roster billing. Roster billing allows submission of a single claim form with a roster of beneficiaries vaccinated on the same date of service. Use Medicare Beneficiary Identifiers (MBIs) to verify eligibility and submit claims.

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Last Updated Oct 20 , 2026