TicSalut
Generalitat de Catalunya - Departament de Salut

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05-03-2015

IHTSDO has announced the withdrawal of legacy SNOMED CT antecedent codes before April 26, 2017.

International Health Terminology Standards Development Organisation

IHTSDO has announed the withdrawal of legacy SNOMED CT antecedent codes, such as SNOP, SNOMED, SNOMED II, SNOMED International (3.x), and SNOMED RT

IHTSDO announced that from April 26, 2017 it would no longer license the use of SNOMED antecedent works. SNOMED antecedent works are SNOP, SNOMED, SNOMED II, SNOMED International (3.x), and SNOMED RT. 

It strongly urged users of these antecedent/old versions to migrate to SNOMED CT as soon as possible. The reason for phasing out support of antecedent versions is that both clinical science and the terminology itself have evolved considerably since they were first developed, so use of these versions involves risk. IHTSDO cannot be responsible for this risk.

A limited license will be available for research purposes and to enable the interpretation of historical data captured using antecedent versions.

The biannual release to SNOMED CT International Edition includes an antecedent SNOMED identifier reference set, which contains SNOMED, SNOMED II, and SNOMED International (3.x) concept identifiers. This reference set will be withdrawn from use according to this timeline:

  • July 2015 SNOMED CT International Edition: No change regarding antecedent SNOMED identifier reference set.

  • January 2016 SNOMED CT International Edition: The last release to include the antecedent SNOMED identifiers for new SNOMED CT content.

  • July 2016 SNOMED CT International Edition: The last release to contain the antecedent SNOMED identifier reference set.

  • January 2017 SNOMED CT International Edition: The antecedent SNOMED identifier reference set will be withdrawn and no longer be available in the release. After the antecedent SNOMED identifier reference set has been withdrawn from the International Edition, it will be made permanently available for download as a legacy IHTSDO product, here: https://mlds.ihtsdotools.org/#/viewReleases/viewRelease/5376.

IHTSDO again strongly urges users of these antecedent versions to migrate to SNOMED CT as soon as possible. 

Information about migration to SNOMED CT is available in the Technical Implementation Guide (http://snomed.org/tig.pdf).

Throughout 2015 IHTSDO will remind users of antecedent versions that it will no longer license their use after 26 April, 2017.

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