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. 2017 Dec 15;5(3):9. doi: 10.5334/egems.200

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Copyright: © 2017 The Author(s)

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.

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Data Source Linkages.

Data Source Acronyms, clockwise from top: Provider Enrollment, Chain, and Ownership System (PECOS); SK&A Healthcare Databases (SK&A); Healthcare Relational Services Databases (HCRS); Internal Revenue Service 990 forms (IRS); American Hospital Association annual survey of hospitals (AHA).

Matching Variable Acronyms, alphabetically: American Hospital Association ID (AHA ID); CMS Certification Number (CCN); National Provider Identifier (NPI); Tax Identification Number (TIN).

Notes: Data sources specified in the black boxes may be linked through the matching variables specified in the gray boxes.