Flu vaccinations

Percentage of fee-for-service (FFS) Medicare enrollees that had an annual flu vaccination.
The 2019 County Health Rankings used data from 2016 for this measure.

Measure Tabs


Reason for Ranking

Influenza is a potentially serious disease that can lead to hospitalization and even death. Every year there are millions of influenza infections, hundreds of thousands of flu-related hospitalizations, and thousands of flu-related deaths. An annual flu vaccine is the best way to help protect against influenza and may reduce the risk of flu illness, flu-related hospitalizations, and even flu-related death [1].

Key Measure Methods

Flu Vaccinations is a Percentage

Flu Vaccinations is the percentage of fee-for-service Medicare enrollees that had a reimbursed flu vaccination during the year.

Measure Limitations

This measure includes only the percentage of Medicare FFS enrollees who have received a flu vaccine and may potentially miss trends and disparities among younger age groups or people not enrolled in Medicare.


This numerator is the number of Medicare beneficiaries enrolled in fee-for-service Medicare Part B for at least one month of the selected year and who have received a covered influenza vaccine in the last year (Current Procedural Terminology/Healthcare Common Procedure Coding System codes: 90630, 90653-90657, 90660-90662, 90672-90674, 90685-90688, Q2035-Q2039, G0008).


The denominator includes Medicare beneficiaries enrolled in fee-for-service Medicare Part B for at least one month of the selected year.

Can This Measure Be Used to Track Progress?

This measure can be used to track progress with some caveats. This measure was first included in the 2019 Rankings, but trend graph data can be used to track progress.

Data Source

Years of Data Used


Mapping Medicare Disparities Tool

The Centers for Medicare & Medicaid Services Office of Minority Health's Mapping Medicare Disparities (MMD) Tool contains health outcome measures for all states and counties for disease prevalence, costs, hospitalization for 55 specific chronic conditions, emergency department utilization, readmissions rates, mortality, preventable hospitalizations, and preventive services.

Digging Deeper

Subcounty Areafalse

Flu vaccination data by age groups, sex, and race can be obtained from the Mapping Medicare Disparities tool.


[1] Key Facts About Seasonal Flu Vaccine. Centers for Disease Control and Prevention. September 2018. https://www.cdc.gov/flu/protect/keyfacts.htm

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