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Terminology owner/maintenance organisation

Name, contact details, website
RSNA (Radiological Society of North America),
820 Jorie Blvd., Suite 200
Oak Brook, IL 60523-2251 USA

Formal name of the code system

RadLex radiology lexicon

Short name or abbreviation of the code system name

Technical identifier/s of the code system (OIDs, URNs etc)2.16.840.1.113883.6.256

Scope/domain statement for the code system

(Official or from HTA)

RadLex is a comprehensive set of radiology terms for use in radiology reporting, decision support, data mining, data registries, education and research.

Link to information about the code system - including how to obtain the content

Arrangement or agreements with HL7 for use of content

RadLex is licensed freely for commercial and non-commercial users.

IP Information and Licensing Information

HL7 users of this information - which HL7 products use this link (if known)

Hl7 v2, Hl7 v3, Hl7 CDA, HL7 FHIR

Process to request content change

RadLex Comments
Use the RadLex form to provide feedback on the RadLex radiology lexicon and suggest new RadLex terms. If you wish to submit an extensive set of terms, please use the spreadsheet form available at and email the completed spreadsheet to

Other useful Information

RadLex Playbook is a project of the Radiological Society of North America (RSNA), and constitutes a portion of the RadLex ontology. Playbook aims to provide a standard system for naming radiology procedures, based on the elements which define an imaging exam such as modality and body part. By providing standard names and codes for radiologic studies, Playbook is intended to facilitate a variety of operational and quality improvement efforts, including workflow optimization, chargemaster management, radiation dose tracking, enterprise integration and image exchange.

As of RadLex Playbook version 2.5, a four-year project to harmonize RadLex Playbook with the radiology portion of the LOINC standard has been concluded, leading to the LOINC-RSNA Radiology Playbook which is jointly managed by the Regenstrief Institute (publisher of LOINC) and RSNA. This harmonized Playbook defines a new information model for describing imaging procedures, and identifies correspondences between RadLex Playbook codes and LOINC codes. (See and for details.) Note that RadLex Playbook codes start with "RPID" followed by a numerical value. LOINC codes consist of a numerical code, followed by a hyphen and a single additional digit (called the check digit). Note that in the future, new codes will be created in the LOINC format only, not the RPID format. New adopters are encouraged to use LOINC-format codes.

LOINC-format codes may be accessed at New code requests may be submitted to the joint Regenstrief-RSNA governance committee at

Information current as at (date)

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