CMS Manual System Transmittal 1675: Standard System Change to Allow Claims Processing Contractors Flexibility with 9-Digit ZIP Codes
Guidance for contractors providing notice that CMS will allow claims processing contractors to more quickly add new 4-digit ZIP code extensions to the 9-digit ZIP code file for pricing purposes.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: January 30, 2009
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