Data element name

Sub data element name


Code System Owner

NameRSNA (Radiological Society of North America),

Phone number1-800-381-6660
Address820 Jorie Blvd., Suite 200
Oak Brook, IL 60523-2251 USA
Code System Maintainer (Steward)Name
Email address
Phone number
Code System PublisherName
Email address
Phone number
Code System NamesFormal name of the code systemRadLex radiology lexicon
Short name of the code systemRadLex
Code System Technical IdentifiersHTA-endorsed URI
HTA-endorsed OID2.16.840.1.113883.6.256
Other URIs
Other OIDs
Code System InformationLink

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

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

From the RSNA website:

"We (RSNA) recognize the benefits that come from radiologists using common language to communicate diagnostic results. For this reason, RSNA produced RadLex®, a comprehensive set of radiology terms for use in radiology reporting, decision support, data mining, data registries, education and research.

RadLex provides the foundation for vital data resources used in radiology:

The development of RadLex has been supported by the National Institute of Biomedical Imaging and Bioengineering (NIBIB) and the cancer Biomedical Informatics Grid (caBIG) project."

Arrangement or agreements with HL7 for use of content
Version management
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
Code System Copyright, Intellectual Property and LicensingCopyright Statement

"Copyright 2014 – The Radiological Society of North America (RSNA), all rights reserved
Licensed under RadLex License Version 2.0. You may obtain a copy of the license at:

This work is distributed under the above noted license on an “AS IS” basis, WITHOUT WARRANTIES OF ANY KIND, either express or implied. Please see the license for complete terms and conditions. "

Copyright Information"Subject to the terms and conditions of this Agreement,
Licensor hereby grants to You a worldwide, non-exclusive, no-charge, royalty-free copyright license to reproduce, prepare Adaptations of, publicly display, publicly perform, sublicense, and distribute the Work and such Adaptations in any medium."
Intellectual Property Information
Licensing InformationRadLex is licensed freely for commercial and non-commercial users. Review and download the license.
HTA endorsement status (Draft, In review, Endorsed for use, Pending re-endorsement, Retired) ValueEndorsed for use
Assignment date2019-05-05
HTA review statusLast review date2022-03-30
Next review date2023-03-30
Information current as at (date)
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  1. Process to add RadLex to THO started via UP-252 - Getting issue details... STATUS

  2. Updated to remove "/" from URL, in-line with FHIR spec. Requested the same change in THO.