Thank you for your request for information about the following:

Request

Primary Care Networks (PCNs) were introduced in 2019, and I understand some larger PCNs (over 50,000 patients) were split into smaller Service Delivery Units (SDUs). I would like to know:

1) how many PCNs have been split into smaller SDUs, and:
2) how many SDUs there are in England.

The NHS Business Services Authority (NHSBSA) received your request on 17 September 2025.

We have handled your request under the Freedom of Information Act (FOIA) 2000.

Our response

I am writing to advise you that following a search of our paper and electronic records, I have established that the information you requested is not held by the NHSBSA.

Advice and Assistance

Having reviewed your request, I believe that it is possible that NHS England may hold some or all of the information you require.

They can be contacted at:

NHS England
PO Box 16738
Redditch
B97 9PT
Email: england.contactus@nhs.net