B18zip Online

The 2015-2017 Cohort 18 Baseline was conducted using version 3.0 of the HOS survey.

HOS measures how well Medicare Advantage plans help beneficiaries maintain or improve their health. The geographic information provided by B18ZIP helps in longitudinal studies tracking the same individuals over a two-year period. B18zip

B18ZIP serves as the member zipcode field, identifying the beneficiary’s geographic location at the time of the HOS baseline survey. The 2015-2017 Cohort 18 Baseline was conducted using