What changed in ODS in U89554. History comes from monthly NHS releases until August 2026, then from the ODS API every 6 hours.
Showing changes by the date they first appeared in ODS. Switch to "date effective" for counts by when things actually happened.
Effective 11 May 2021
Effective 1 Oct 2019
2 changes to PCNs in the chart (notable), counted by date recorded. Before September 2026 changes are dated to the monthly release that first showed them, so reorganisations (e.g. April 2020, April 2026) spike.