NPI Timelines
The following documents illustrate critical dates for NPI implementation, as well as critical dates for the release and use of the revised CMS-1500 (08/05) and UB-04.

NPI Important Dates pdf
NPI CMS Requirements for Professional Claims - CMS-1500 (12/90) and CMS-1500 (08/05) pdf
NPI CMS Requirements for Institutional Claims - UB-92 and UB-04 pdf