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National Casemix Office

The National Casemix Office (NCO) designs and refines classifications used to describe NHS healthcare activity in England. These classifications underpin the national reimbursement system from costing through to payment, and support local commissioning and performance management.

For more information about the work of the National Casemix Office, HRG designs and our stakeholder engagement, please visit our definitions, remit and deliverables.  

Contact details

If you have a question about our Grouper products, please call 0300 303 5678 or email

Further information

internal Register for updates

Register for updates here and keep up-to-date with the latest Grouper releases and casemix products. When a new Grouper product is released, you will be contacted via email.

internal Clinical Training Tool (CTT)

The Clinical Training Tool (CTT) has been developed by the National Casemix Office (NCO) in partnership with our 3rd Party Software Supplier, Woodward Associates, with the primary aim of enabling end users to understand the Casemix HRG4+ design.

internal Our definitions, remit and deliverables

Find out more about the National Casemix Office (NCO), its context within the health service, casemix methodology and the development and design of HRGs.

Last edited: 24 September 2020 7:43 am