Talk:National Provider Identifier

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Comments[edit]

Does anyone know how the NPI checksum works?

update Feb 9, 2008 - The NPI number uses the Luhn forumla to calculate. You put in 9 numbers, it runs through an algorithm (google it), and generates the 10th digit, which is a check digit used for validation.

This needs a citation .... Anyone? --Mistsrider (talk) 19:58, 19 January 2011 (UTC)[reply]

These people are a joke 2601:701:8201:41B0:728A:A7DD:212E:60F7 (talk) 18:03, 12 April 2023 (UTC)[reply]