Welcome to the U.S. SNOMED CT® Content Request System (USCRS).
This system allows users to request basic changes to SNOMED CT.
Log into the USCRS with a UMLS® Terminology Services (UTS)
account. Visit the UTS site to sign up for an account if you do not
already have one.
Users select from 11 online templates to enter requests to add,
change or retire information in SNOMED CT:
- New Concept
- New Synonym
- Add Parent
- Change Description
- Change Parent
- Change Relationship
- New Relationship
- Retire Concept
- Retire Description
- Retire Relationship
Users submit online requests separately or grouped together to form
a batch. Save draft requests for later completion, validation, and
Users may also download the USCRS batch request template to submit
multiple requests prepared offline. The template, in Excel®
spreadsheet format, includes instructions for use, and a separate
worksheet for submission of each of the request types. Upload completed
spreadsheets into the USCRS to generate tasks to review, edit, validate
User may view and search requests and track their progress through
evaluation and eventual inclusion into either the International Release
of SNOMED CT (if accepted) or the US Extension to SNOMED CT. Search and
view requests submitted by other users for similar or identical
Each page of the USCRS contains a help link to context-sensitive
An understanding of SNOMED CT content and structure is required,
and each request must include a justification, or practical use case.
Every request must also include an identifier that links to the current
version of either SNOMED CT International or the US Extension to SNOMED
CT. Both SNOMED CT International and the US Extension are available from
the Downloads menu of the UTS. Users may search for SNOMED CT terms,
ConceptIDs, and DescriptionIDs in the NLM SNOMED CT Browser which is
available from the Applications menu of the UTS.
The U.S. SNOMED CT Content Request System is an important new tool
in the NLM effort to support the development, enhancement, and
distribution of clinically specific vocabularies to facilitate the
exchange of clinical data and improve retrieval of health information.
SNOMED CT is one of a suite of designated standards for use in U.S.
Federal Government systems for the electronic exchange of clinical
health information and is also a required standard in interoperability
specifications of the U.S. Healthcare Information Technology Standards
NLM welcomes your suggestions to improve this new system. Send
questions and suggestions on the U.S. SNOMED CT Content Request System
to NLM Customer Service (email@example.com) with the subject line
"U.S. SNOMED CT Content Request System."