Pub 100-08 Medicare Program Integrity: Provider/Supplier Enrollment Approval Letters
Guidance that adds the requirement to include National Provider Identifier (NPI) in the provider/supplier Medicare enrollment approval letter. The letter shall instruct suppliers to use the NPI on all claims submitted to Medicare, and to use the PTAN as an identifier on all inquiries made via the interactive voice response system.
Issued by: Centers for Medicare & Medicaid Services (CMS)
Issue Date: March 23, 2007
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