Beneficiary County Code from Claim (SSA)

SAS Name

The 3-digit social security administration (SSA) standard county code of a beneficiary's residence.


CMS enrollment data is obtained from the source CMS Common Medicare Environment (CME) data.

A listing of county codes can be found on the US Census website; also CMS has corebased statistical area (CBSA) crosswalk files available on their website, which include state and county SSA codes.

Source: CMS Encounter Data System (EDS)