Only half of the NHS’s new regional health service bodies will be fully ready to start work when the changes come into effect on Monday.
Just 106 of the 211 Clinical Commissioning Groups (CCGs) are "fully authorised", said NHS England.
The new groups are led by GPs and other clinicians who will take on responsibility for commissioning local hospital, community health and mental health services.
On April 1, the NHS in England will undergo the biggest reform in its history. Here's how will it affect you, and the way the NHS is run.
It seems fears over just how much competition will be injected into the NHS are still very much alive.
GPs and Labour MPs have warned that NHS reforms due to take effect in the coming weeks will lead to a free-for-all for private providers.