Skip to main content

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.

Related

Topics

Data Categories

More from the NBER

In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Retirement and Disability, the Bulletin on Health, and the Bulletin on Entrepreneurship — as well as online conference reports, video lectures, and interviews.

 2025, 17th Annual Feldstein Lecture, N. Gregory Mankiw," The Fiscal Future"
  • Feldstein Lecture
N. Gregory Mankiw, Robert M. Beren Professor of Economics at Harvard University, presented the 2025 Martin Feldstein...
 2024 Methods Lecture, Susan Athey, "Analysis and Design of Multi-Armed Bandit Experiments and Policy Learning"
  • Methods Lectures
Background Materials:backgroundAthey, Susan, Undral Byambadalai, Vitor Hadad, Sanath Kumar Krishnamurthy, Weiwen Leung...