SSA to Federal Information Processing Series (FIPS) Core-Based Statistical Area (CBSA) and Metropolitan and Micropolitan Statistical Area (MSA) County Crosswalk

Source CMS

CMS periodically produces SSA to FIPS CBSA to county crosswalk files. They released a CBSA to MSA to FIPS county crosswalk as well. Some CMS data files have SSA state and county codes or county name rather than FIPS state and county codes.

Updates and changes.

The MSA CBSA FIPS County crosswalk below is a merge of the individual CBSA and MSA files below.

Users should be aware that it appears that CMS did not update their SSA to FIPS county crosswalk to use 2010 Census definitions. It should be possible; however, to link the FIPS county codes in this file to those in Census' CBSA to FIPS County Crosswalk file to get more up to date CBSA definititions.

Some additional notes about the data are the following:

Los Angeles FIPS 06037 can have two SSA county codes: 05210 and 05200.
Los Angeles is the only FIPS county with multiple SSA codes.
2012-2016 files are identical.
2005 and 2011 file have 3,289 counties and 2012-2016 have 3,273 counties.
A list of the counties present in 2011 and not in 2012 is in Updates and changes

Combined MSA CBSA FIPS County Crosswalk 2005, 2011-2017
SAS	Stata	CSV	Desc

CBSA to SSA and FIPS State and County Crosswalk
Fiscal Year	Source ZIP	Source Excel	Source Text	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2017	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2016	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2015	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2014	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
CMS delivered the same source spreadsheet in the FY 2014 and FY 2013 deliveries. This could mean that CMS made no changes to the source file and reused the same file in the next year when the underlying data had no change..
2013	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2012	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
2011	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Diff Year N+1	Diff Year N-1
CMS did not produce SSA to MSA or CBSA crosswalks between 2005-2011. This file is a crosswalk by county from the old MSA to the New MSA (under the CBSA definitions) and includes SSA state and county as well.
FY 2005	Source ZIP	Source Excel	Source txt	SAS	Stata	CSV	Desc	Not Applicable