Fiscal Intermediaries A B MACs Determine Locality
(03/2010)
Fiscal intermediaries/A/B MACs determine locality based upon the ZIP code of the provider’s physical address. This address, including the ZIP code, is stored on the provider file as the master address.
CR 5208, issued March 09, 2007, had attached to it the list of ZIP codes that would require the 9-digit ZIP codes effective for claims with dates of service on or after October 1, 2007. This CR provides a small number of updates to the list found in CR 5208. Contractors will need to notify physicians, practitioners, non-physician practitioners, and providers of these changes so that they may take appropriate action. When the 9-digit ZIP code file is available for download by the contractors, it will take into account these revisions.
A provider education article related to this instruction will be available at
http://www.cms.hhs.gov/transmittals/downloads/R1193CP.pdf