When should trusts carry out a re-trace to the NHS Strategic Tracing Service (NSTS)?
A trace of the whole Patient Administration System (PAS) should be carried out not less than 6 months prior to migration; a second trace of the PAS should take place just before migration. A patient’s NHS Number can change for a number of reasons (e.g. a duplicate NHS Number gets cleared), so it is essential that records are re-traced prior to migration to ensure the most up to date details are transferred. Remember you need to arrange with the NSTS service provider Atos Origin if you intend to submit batches of more than 1 million records.