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Jean Roth created the NPI to state license crosswalk below from the National Plan and Provider Enumeration System (NPPES) downloadable data file for greater ease of use. Around 25% of NPIs have more than one provider license associated with it.

One limitation of this dataset is that the provider had to include their state license number on the NPI application in order for the license number to appear here.

Processed versions of the source NPPES data these files are made from is also available.

Updates and changes.

Stata

SAS

CSV

Desc

  statelic.dta     statelic.sas7bdat     statelic.csv     desc_statelic.txt  

Contact data@nber.org with questions, comments, or suggestions.

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