England is organised into 42 Integrated Care Systems (ICSs). Each ICS is overseen by an Integrated Care Board (ICB), which is legally responsible for funding and planning health services in its area.

In 2024, NHS England directed ICBs to cut costs by 50% by forming 26 leadership clusters, sharing senior teams and administrative functions.

From April 2026, some clusters will formally merge into new, larger ICBs, reducing the total number of statutory boards. Further mergers are planned into 2027.

While former Clinical Commissioning Group (CCG) boundaries no longer exist legally, they remain important for statistical and operational purposes, such as tracking prescribing data.

Explore Integrated Care Board boundaries on a map