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SNOMED CT

SNOMED CT Technical discussions

 

Query received by the SNOMED CT in Primary Care team: Is the mapping between Read v2 and CTV3 and SNOMED CT a one to one relationship?

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December 08. 2016
SNOMED CT in Primary Care Admin
Query received by the SNOMED CT in Primary Care team: Is the mapping between Read v2 and CTV3 and SNOMED CT a one to one relationship?
December 09. 2016
Denise Downs

From Read codes to SNOMED CT is a one to one map. However going the other way from SNOMED CT to Read it could be 1-to-more than 1 Read code. This is because some Read codes mean the same thing so map to the same SNOMED CT code.

As part of the phased transition to SNOMED CT, suppliers will initially be adding SNOMED CT to a record as well as Read codes.

To support this 'dual coding' when the system has initially moved to SNOMED CT,  a national mapping table from SNOMED CT to Read has been provided. This provides a single Read code for the GP subset of SNOMED CT. For example, it maps to the closest Read term based on the description text or to the most frequently used Read code. If anyone wants further details this is provided in documentation available to download from NHS Digital (NHS Data Migration).

 

 

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