The database provides responses to queries that have been received via our helpdesk.

You can  'Search' for particular words in the various areas of the responses if you have something specific in mind.

If you cant find the answer to your query please contact our helpdesk by emailing

There are 40 entries.
Order by

Sort by

then by

then by

List of rows for this database
Query typeQuery detailsResolutionUpdatedDate added to databaseUID
Will SNOMED Codes be updated twice a year (in October and April) like Read codes?
Yes, new releases are provided for 1st April and 1st October each year. Suppliers implement these into their systems as soon as possible.
06 Mar 2017 101 View
When is SNOMED CT being implemented?
UPDATED 31 May 2018
SNOMED CT will go live across general practice in a phased approach from April 2018. In general this will be via two phases: behind the scenes changes and those that impact users. Deployment will commence with testing at pilot sites for each of the four principal clinical system suppliers: EMIS, TPP, Vision and Microtest.
National rollout schedules will be confirmed to practices by each supplier when their pilot activity has concluded.
A deployment schedule providing estimated dates is available on the Main Publications page of this website.
Current project plans indicate that full deployment of the SNOMED CT solutions (all phases) for all suppliers will be completed by Autumn 2018.
31 May 2018 06 Mar 2017 102.03 View
Can organisations create their own subsets or would you just limit a search field to a specified parent code?
The transition to SNOMED CT should not change existing functionality; where this is currently possible, it should still be available but using SNOMED CT.
06 Mar 2017 103 View
How will Dual Coding Support the Change?
UPDATED 31 May 2018
Please see our Fact sheet on Dual Coding. (Found in Main Publications
31 May 2018 06 Mar 2017 104.04 View
What data quality measures are in place to ensure that translation from READ codes to SNOMED CT will not produce artefactual coding errors?
UPDATED 31 May 2018
The mapping tables have been reviewed by an expert reference group of GPs nominated by the Joint GP IT Committee utilising various software tools to guide their quality assurance. The maps utilise the existing Read/CTV3 maps which have been in use for many years as part of GP2GP. The recent work has improved the existing maps and will also address many of the maps that currently result in text degrades in GP2GP.

The maps will continue to be updated as SNOMED CT is updated and we would ask users to notify the terminology service if they identify any issues with the maps using the Terminology request portal.
31 May 2018 06 Mar 2017 105.03 View
Why can't primary care continue to map to SNOMED CT?
UPDATED 106.02
Currently there are two versions of clinical codes (Read v2 and CTV3) in existence within general practice, so not all GP systems use the same coding system and they do not provide the sophisticated features now expected from a clinical terminology.

The NHS needs a single clinical terminology (SNOMED CT) in order for clinical data to be exchanged accurately and consistently across all care settings; this will enable better patient care and improve the analysis and reporting of clinical data.

Read codes are only available in the UK whereas SNOMED CT is an international terminology, and using this will enable the UK to participate more effectively in research and analysis of health information to support national and global health care improvements.

The Read codes have a number of design restrictions that are already causing issues:

*Read v2 was designed for general practice; it is not possible to extend this to cover the requirements of all of healthcare due to its fixed 5 character codes. SNOMED CT provides content for all health and care.
–* In Read there is no mechanism to safely 'delete' out of date or erroneous codes. There are requirements to retire some of the codes in Read v2 and SNOMED CT enables these requirements to be met.
* Some areas of Read v2 are full and terms cannot be added where they logically need to sit. Therefore codes have been allocated into a 'vacant space'. Writing accurate reports then becomes problematic; in Read there are reports that are incorrect and have missed codes that are located in wrong areas of the terminology. SNOMED CT does not have these limitations and will address this issue.
* Where data is communicated electronically between GP practices, mechanisms have evolved to facilitate the two sets of Read codes (v2 and CTV3), however, because of the depth of detail that we know exists in SNOMED CT in secondary care, it is not possible to go from SNOMED CT back to Read.
27 Oct 2017 06 Mar 2017 106.02 View
Will Historical Data be coded in Read and SNOMED CT?
UPDATED 31 May 2018
Yes, all historical coded data in Read will have an associated SNOMED CT code; this will enable new SNOMED CT searches to function over historical data and will enable things such as time series analysis to continue when the system transitions to SNOMED CT.
31 May 2018 06 Mar 2017 107.01 View
Is there a central repository that catalogues all READ v2 / CVT3 codes and the corresponding SNOMED CT code?
UPDATED 31 May 2018
Files are provided by the UK Terminology Centre that provide the equivalent SNOMED CT code for each Read code. This can be obtained by downloading the NHS Data Migration pack from TRUD and contains supporting documentation. An access database that contains the above files and allows users to explore the equivalent codes is also available and is known as the UKTC Data Migration Workbench. There is now available a number of websites that provide look-ups on a Read code, these are listed on the "useful links" area of our website.

Having multiple coding schemes creates additional burden and cost to the NHS; being on a single terminology will allow practices to receive already coded Discharge Summaries from hospitals and reduce text degrades substantially in GP2GP.
31 May 2018 06 Mar 2017 108.01 View
What will happen to my reports?
UPDATED 31 May 2018
Existing reports will still run while dual coding is in place (see our fact sheet for more information on dual coding). Suppliers will manage the conversion of national reports such as QOF and users will be able to utilise these in new reports as you do now. However, for locally written reports, when practices start to use terms in SNOMED CT that do not have an equivalent code in Read, these reports will need to be updated and reviewed. It is not possible to automatically convert existing reports to include SNOMED CT content that is not in Read, although suppliers will provide an initial conversion of the existing report. See your supplier support centre for further details. End users should also contact their CCG to understand what training and support is available in relation to templates and searches; a webinar and supporting document on designing searches is also provided on this website in Main Publications.
31 May 2018 06 Mar 2017 109.02 View
What do I need to do as a practice?
UPDATED 1 June 2018
You can keep up to date on progress via our SNAP Update, which is published monthly, and your supplier support centre will provide specific information in relation to your system. The Newsfeed on this site also informs of the various stages achieved.
As a practice we recommend:
- that staff who will enter data gain some appreciation of SNOMED CT, either through eLearning provided by your supplier or the NHS Digital Exploring SNOMED CT Content webinar
- you undertake a 'spring clean' of all your reports and templates; archiving or deleting those that you have not used for over 12 months. They are probably out of date to run in Read.
- that staff undertake supplier training when available.
01 Jun 2018 06 Mar 2017 110.05 View
Will I need to undertake testing at my practice?
As part of the project to adopt SNOMED CT in primary care, assurance of the national systems and GPSoC contractual functions will be undertaken through the standard GPSoC assurance process.
If you have a system that is outside the GPSoC framework, you should plan locally for any testing you need to undertake for the adoption of SNOMED CT.
06 Mar 2017 111 View
What do I need to do as a CCG?
UPDATED 1 June 2018
NHS Digital provides a guidance document for CCGs which provides links to resources for CCGs and GP practices provided by NHS Digital.

Updates are provided through a monthly SNAP Update, regular NHS Digital and NHS England bulletins and a collaborative on-line webspace. A number of workshops have been held and materials are available on this website. CCGs are required to identify a SNOMED CT lead and ensure NHS Digital have their details (email:

CCGs are recommended to:
- undertake “housekeeping" of their reports: delete out-dated reports and identify critical reports which will need early oversight once users are entering SNOMED CT content with no Read equivalent.
- read the Data Quality Guidance document that details how mapping to SNOMED CT has been done; this is likely to highlight possible areas of attention in relation to training, templates and searches.
- look at the tools they use for data analysis and ensure they have plans in place to ensure these tools are updated to accommodate SNOMED CT.
- appraise themselves of the training provided by NHS Digital; these materials are available under the Open Government License and can be downloaded and used by the CCG.
- appraise themselves of Read codes that will map to inactive SNOMED CT concepts as they are out-dated or not interoperable.

For systems and services that CCGs use which are outside the GPSoC framework and utilise Read codes, contact the suppliers to ensure plans are in place for the transition to SNOMED CT.
01 Jun 2018 06 Mar 2017 112.02 View
What Training is available?
UPDATED 1 June 2018
Suppliers of the clinical system are providing training to their end users for their system functionality using their preferred training approach.

NHS Digital provide training to help individuals learn more about SNOMED CT e.g. how to find content, developing reports etc. through the use of live WebEx’s, online training resources and materials from previous workshops. Details are in the Education and Training section of this website.
01 Jun 2018 06 Mar 2017 113.01 View
Are practices expected to carry out some kind of batch transfer to change current read codes to Snomed ones?
No, there will not be a requirement to undertake a batch transfer; in effect systems will create equivalent SNOMED CT codes for the existing Read codes in patient records.  The current Read codes in records will remain in the record. This is being undertaken by your principal supplier.
06 Mar 2017 114 View
When is primary care to start using SNOMED CT?
UPDATED 1 June 2018
SNOMED CT will go live in general practice in number of phases from April 2018; the exact approach for each supplier may differ slightly. Each phase will commence with pilot site testing; once complete them roll-out across the supplier estate will commence. Details of releases will be provided by your supplier, and an overview of the supplier approach is provided on this website.

Secondary Care, Acute Care, Mental Health, Community and other systems used in the direct management of care of an individual must use SNOMED CT before 1 April 2020, although a number already do use SNOMED CT.
01 Jun 2018 06 Mar 2017 115.03 View
Will all local reports need to be re-written in SNOMED CT?
UPDATED 1 June 2018
The system suppliers are developing solutions to help organisations convert these reports. Whilst entering terms that are in the GP subset these reports will continue to work but once content is added outside the GP subset, these reports may not retrieve records with such content (for information on the GP subsets see the Dual Coding Fact Sheet). It is recommended that organisations review and delete/archive the large numbers of reports that haven’t been used for over 12months.
01 Jun 2018 06 Mar 2017 116.02 View
What’s happening with MIQUEST?
UPDATED 1 June 2018
MIQUEST will not be supported beyond the current GPSoC contract.

Whilst MIQUEST Read queries will continue to run in current systems, it should be noted that they will not select records that contain codes that cannot be dual coded. (For more information on Dual Coding see our Fact Sheet in Main Publications)
01 Jun 2018 06 Mar 2017 117.03 View
When will all local reports need re authoring in SNOMED CT by?   
UPDATED 1 June 2018
Once users start using terms that cannot be dual coded, it is recommended that the report is updated to SNOMED CT (all suppliers have agreed to continue dual coding until 1st April 2020). If the report reflects national guidance or services with details provided in SNOMED CT, local reports should be updated to SNOMED CT as the hierarchy structure is different to that in Read/CTV3. The point when all reports will need to be converted is partly a local decision based on usage of reports.
01 Jun 2018 06 Mar 2017 118.01 View
Will training be mandated?
No, suppliers of the clinical system will provide training to their end users for their system functionality using their preferred training tools. Any queries regarding this should be directed to your GP system supplier.

NHS Digital provides a variety of training resources and strongly recommends that users of clinical systems attend as a minimum, the Introduction to SNOMED CT webinar. This is available monthly either as a live 1-hour presentation with various dates available, as a 1hr recording, or as separate short recorded presentation sessions. As a minimum, NHS Digital advises all users of Read codes to attend sessions 3 and 4: ‘Finding content in SNOMED’ and ‘Comparison with Read’. Those who write searches/reports are advised to attend the training on Designing Queries and Searches in SNOMED CT. All our WebEx’s can be found on our Delen site at:
31 Jul 2017 06 Mar 2017 119.02 View
How will QOF be impacted?
UPDATED 1 June 2018
QOF queries will be provided in SNOMED CT only from 2018/19 onwards.
01 Jun 2018 06 Mar 2017 120.02 View
Next pageLast page