NHS Improvement (NHSI) was a non-departmental body in England, responsible for overseeing the National Health Service's foundation trusts and NHS trusts, as well as independent providers that provide NHS-funded care.

It supported providers to give patients consistently safe, high quality, compassionate care within local health systems that are financially sustainable.

In 2018 it became clear that the organisation, while maintaining its statutory independence, was for practical reasons to be merged with NHS England, and seven "single integrated regional teams" would be jointly established.

[8] Claire Murdoch, chief executive of Central and North West London NHS Foundation Trust, placed 125th, complained that the league had a “significant methodological flaw in terms of fairness” because it implied that there were significant differences between ranks 120 and 121, and because, she complained, the assessments were not carried out consistently and the large amount of information trusts reported monthly to the Care Quality Commission were not taken into account.

[9] In September 2017 a plan was produced to create 29 pathology networks across England in a bid to save £200 million.