Managers in Partnership (MiP), the NHS managers union, warned the cuts will damage local economies and hinder the ability to retain skilled workers.
MiP chief executive Jon Restell said: “The government’s massive gamble to cut half of the ICB workforce was taken without any plan or assessment of what new structures need to do.
“Three months on from that decision there is still no sign of the Ten Year Health Plan and still no national mechanism to make staff redundant.
“The speed of the cuts, to be made by the end of the year, is causing chaos.”
According to the Local Democracy Reporting Service, it was confirmed at a recent Integrated Care Partnership meeting that formal proposals to create a Leicester, Northamptonshire, Rutland ICB cluster were submitted to NHS England in May.
If approved, it would not be a full merger, but would introduce shared management and functions.