CDS UNIQUE IDENTIFIER

Format/Length:min an1 max an35
National Codes: 
Default Codes: 

Notes:
CDS UNIQUE IDENTIFIER is the same as attribute RECORD IDENTIFIER.

CDS UNIQUE IDENTIFIER provides a unique identity for the life-time of an episode carried in a Commissioning Data Set message.

Note that the CDS UNIQUE IDENTIFIER must be constructed without the use of PATIENT Confidential Information. This includes PATIENT Identifiers such as NHS NUMBER or LOCAL PATIENT IDENTIFIER (EXTENDED), as well as any text which may identify the PATIENT DIAGNOSIS of the PATIENT or any PATIENT procedures being undertaken.

See the Commissioning Data Set Submission Protocol for detailed information.

Once assigned, a Commissioning Data Set record must retain its CDS UNIQUE IDENTIFIER otherwise duplicate Commissioning Data Set records may be generated and stored in the Secondary Uses Service database.

The CDS UNIQUE IDENTIFIER has three components. The recommended constructs are given below.

For All CDS Types EXCEPT the EAL CDS Types:

REFUIDFORMATCODES / VALUESCOMMENT
1NHS Organisation Code Type an1A = Pre 1996 ORGANISATION CODE
B = Post 1996 NHS ORGANISATION CODE / ORGANISATION IDENTIFIER
Mandatory For all CDS Types 
2Provider Code an5The NHS ORGANISATION CODE / ORGANISATION IDENTIFIER of the Provider at the time of, or at the start of, the period covered by the activity reported by the CDS Message.Mandatory for all CDS Types 
3aApplication Specific CDS Identity an29A code of up to 29 alpha-numeric characters generated by the Sender's application to uniquely identify the CDS within its CDS Type or family of CDS TypesMandatory for all CDS Types
Except for EAL CDS Types 

For EAL End Of Period (EOP) CDS Types only (CDS 6-2 only):

REFUIDFORMATCODES / VALUESCOMMENT
1NHS Organisation Code Type an1A = Pre 1996 ORGANISATION CODE
B = Post 1996 NHS ORGANISATION CODE / ORGANISATION IDENTIFIER
Mandatory For all CDS Types 
2Provider Code an5The NHS ORGANISATION CODE / ORGANISATION IDENTIFIER of the Provider at the time of, or at the start of, the period covered by the activity reported by the CDS Message.Mandatory for all CDS Types 
3bApplication Specific CDS Identity an9A code of up to 9 alpha-numeric characters generated by the Sender's application to uniquely identify the EAL End Of period census CDS Types with the same Admission List Entry. Additional data positions must be left blank.Mandatory for all EAL EOP CDS Types
3cFiller an20Additional data positions must be left blank. 

For EAL Event During Period (EDP) CDS Types only (CDS 6-2 only):

REFUIDFORMATCODES / VALUESCOMMENT
1NHS Organisation Code Type an1A = Pre 1996 ORGANISATION CODE
B = Post 1996 NHS ORGANISATION CODE / ORGANISATION IDENTIFIER
Mandatory For all CDS Types 
2Provider Code an5The NHS ORGANISATION CODE / ORGANISATION IDENTIFIER of the Provider at the time of, or at the start of, the period covered by the activity reported by the CDS Message.Mandatory for all CDS Types 
3dApplication Specific CDS Identity an9A code of up to 5 alpha-numeric characters padded with 4 trailing spaces to 9 characters. Generated by the Sender's application to uniquely identify the EAL Event During Period Census CDS Types with the same Admission List Entry.Mandatory for all EAL EDP CDS Types 
3eFiller an3A code of 3 alpha-numeric characters generated by the Sender's application to identify the event within the EAL Entry. Even if the events are of different types, they must have different identifiers.Mandatory for all EAL EDP CDS Types 
3fFiller an17Additional data positions must be left blank. 

Usage:
CDS UNIQUE IDENTIFIER is a mandatory data item when the Net Change Update Mechanism is used.  It is strongly advised that users of the Bulk Replacement Mechanism maintain a correctly generated CDS UNIQUE IDENTIFIER within the Commissioning Data Set data. This will establish a migration path towards the use of the Net Change Mechanism and will also then minimise the risk of creating duplicate Commissioning Data Set data in the Secondary Uses Service database.

There are circumstances in patient care application systems where the control of the UID key integrity may be suspect. These issues include:

a) Episode deletion (not resulting in a Commissioning Data Set deletion of previously submitted data sent to the original Commissioner);
b) Episode re-sequencing (not resulting in a corresponding Commissioning Data Set records being sent);
c) Service agreement alterations not resulting in correct adjustments - Old Service Agreement deletion / New Service Agreement addition
d) Re-admissions causing duplicate keys on the Secondary Uses Service database.

Each use of an NHS ORGANISATION CODE within a Commissioning Data Set message must be associated with the release version of the NHS Organisation Code scheme. At present this may be derived locally by NHS IT systems.

The following values have been informally used in many Commissioning Data Set implementations and are recommended to be used:

A or O* Signifying "OLD" (pre-April 1996) to denote an ORGANISATION CODE issued before, and in use up to the 1996 major re-issue
B or N* Signifying "NEW" (post-April 1996) to denote an ORGANISATION CODE / ORGANISATION IDENTIFIER issued from April 1996

* The values of A and B must be used in the formatting of the CDS UNIQUE IDENTIFIER.

Note: the Format/Length has been updated in Data Dictionary Change Notice 1808 "Correction of Format/Length Data Elements". The Data Set specifications that contain this item will be updated in the next version of the Information Standard where it is not already correct.

 

This data element is also known by these names:
ContextAlias
pluralCDS UNIQUE IDENTIFIERS

ISO 9001 CERTIFICATION EUROPE