Los Angeles FIPS 06037 can have two SSA county codes: 05210 and 05200
Source File URL: www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/AcuteInpatientPPS/Downloads/FY2015-FR-CBSA-Xwalk-File.zip
Source Page: http://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/AcuteInpatientPPS/FY2015-IPPS-Final-Rule-Home-Page-Items/FY2015-Final-Rule-Data-Files.html
NBER URL: http://www.nber.org/data/cbsa-msa-fips-ssa-county-crosswalk.html
Source: CBSAtoCountycrosswalk_FY15_FR.txt
cbsatocountycrosswalk2015 set up by Jean Roth , jroth@nber.org , 20 Dec 2016