Incorrect NPI Implementation Schedule Published, CMS Clarifies

September 5, 2007

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Due to an incorrectly published schedule of implementation dates by a trade publication, the Centers for Medicare and Medicaid Services (CMS) has reiterated an earlier announcement that providers should look to their Medicare contractors for accurate information. The schedule mentioned affects claim rejections based on the inability to locate an NPI/legacy identifier pair on the Medicare NPI Crosswalk. Providers will be advised by their Medicare contractor as to the particular timeframe for their transition. Any other published schedules are unofficial and may have inaccurate dates. Medicare providers are urged to rely only on information from their Medicare contractors.

Providers may find a recent MLN Matters article helpful in determining how to use the NPI on Part A and Part B claims.