PhysioNet Copying Policy

The new PhysioNet website is available at: We welcome your feedback.

Verbatim copying and redistribution of any material available from PhysioNet is permitted. Please cite PhysioNet and the author of the material you copy or quote!

If you wish to set up a publicly accessible mirror of the PhysioNet web site, please follow the procedure described in How to set up a mirror of PhysioNet.

Note that compiled software in executable form may be available from PhysioNet as a convenience to users. We permit but do not encourage redistribution of these binaries, since binaries do not readily allow users to verify their function. If you redistribute binaries either obtained from PhysioNet, or compiled from sources available from PhysioNet, you must make the corresponding sources available at no more than a nominal charge for copying.

If you wish to distribute modified copies of materials originally obtained from PhysioNet, other terms may apply, as described below. If you have any questions, please write.


All software available from PhysioNet is free software, available either under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation, or, if otherwise indicated within individual source files, under the terms of another license or licenses conforming to the Open Source Definition. These licenses permit you to make and redistribute verbatim copies of the source files, and generally grant other permissions as well.


All data available from PhysioNet are free data. We are not aware of a de facto standard license for free data analogous to the GPL; your suggestions are welcome. You may make and redistribute verbatim copies of data files.

IMPORTANT: Modified copies of data files may not be distributed except under these terms:

We impose these restrictions on distribution of modified copies not to discourage modification, but because it is crucially important that users of these data always be able to distinguish originals from modified copies. PhysioToolkit software is designed to make it easy to comply with these requirements; we encourage you to make use of the relevant code from our software in your own tools.

Documentation and commentary

Permission is granted to reproduce and redistribute all documentation and commentary available from PhysioNet.

Documentation and commentary may be quoted, translated, or otherwise modified, with attribution to the author(s). If the modifications have the effect of altering the meaning of the original text, include a prominent notice indicating that the text has been altered and may no longer reflect the intent of the original author(s).

Questions and Comments

If you would like help understanding, using, or downloading content, please see our Frequently Asked Questions.

If you have any comments, feedback, or particular questions regarding this page, please send them to the webmaster.

Comments and issues can also be raised on PhysioNet's GitHub page.

Updated Thursday, 27 October 2016 at 14:39 EDT

PhysioNet is supported by the National Institute of General Medical Sciences (NIGMS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB) under NIH grant number 2R01GM104987-09.