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NDAR provides a single access to de-identified autism research data. For permission to download data, you will need an NDAR account with approved access to NDAR or a connected repository (AGRE, IAN, or the ATP). For NDAR access, you need to be a research investigator sponsored by an NIH recognized institution with federal wide assurance. See Request Access for more information.

Warning Notice

This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action.

All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

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Subjectkey(GUID) Subject Identifier Source Also Known As

The Autism Community has standardized on the NDAR GUID for cross project subject identifiers.  However, many other identifiers will remain in use by the research community.  To resolve the appropriate GUID/Subjectkey for your identifiers and to ensure that no duplicate subjects exist in data retrieved from NDAR, use the provided interface below (single or multiple entries using the csv template.)

If a match is not found, NDAR has not yet received that subject identifier.  To add subject identifier associations to NDAR, include the subject identifier and submit into NDAR using one of our Resolve Identifiers data structures (e.g. ndar_subject, genomics_subject).  NDAR pseudo-GUID promotions are automatically applied to the repository.   Once submitted and shared, you will receive all related subjects when using the ndar.nih.gov query and download.  If a source exists that we currently don’t support, please contact us at The NDA Help Desk.

For those using data in NDAR contributed by others, please use this interface to determine if duplicate subject identifiers may exist.