Development of an Individual Healthcare Provider Database

Authors

• Anton Chorniy, Northwestern University, Chicago, IL, USA.
• Ali Moghtaderi, George Washington University, Washington, DC, USA.
• Qian Eric Luo, George Washington University, Washington, DC, USA.
• Paula Natalia Barreto Parra, University of Illinois Urbana-Champaign, Urbana, IL, USA.
• Bernard Black, Northwestern University, Pritzker School of Law, Institute for Policy Research, and Kellogg School of Management, Chicago, IL, USA.

Document Type

Journal Article

Publication Date

3-5-2026

Journal

Medical care research and review : MCRR

DOI

10.1177/10775587261424553

Keywords

MD-PPAS; Medicare Carrier files; NPI-UPIN crosswalk; PECOS; provider database

Abstract

The project described in this article develops a comprehensive, public database of U.S. individual healthcare providers from 1999 to 2025 ("Provider Database"). We combine data from multiple sources: NPPES (National Plan and Provider Enumeration System), ResDAC Unique Physician Identification Number Directory (UPIN Directory), Medicare Carrier files; PECOS (Medicare Provider Enrollment, Chain, and Ownership System), MD-PPAS (Medicare Data on Provider Practice and Specialty), DEA (Drug Enforcement Administration), and physician vertical integration data. The database covers 7 million providers, including 1.36 million physicians, covers the 2007 switch from UPIN to National Provider Identifier (NPI), and includes 918,609 NPI-UPIN pairs. Side public databases track providers' zip code and physician integration status over time. Side non-public databases (available to researchers with Carrier file access) include providers' Medicare provider identification number and tax identification number. This article details the database methodology and illustrates its use in studying trends in provider supply, over time and across states, and physician integration.

APA Citation

Chorniy, Anton; Moghtaderi, Ali; Luo, Qian Eric; Barreto Parra, Paula Natalia; and Black, Bernard, "Development of an Individual Healthcare Provider Database" (2026). GW Authored Works. Paper 8929.
https://hsrc.himmelfarb.gwu.edu/gwhpubs/8929

Department

Health Policy and Management