Frequently Asked Questions
Our frequently asked questions cover subjects about clinical classifications ICD-10 and OPCS-4 used in the NHS and associated products and services.
Subject specific frequently asked questions can be found in the navigation bar to the left-hand side of this page.
If you do not find what you are looking for on our web pages please contact our national helpdesk by emailing datastandards@nhs.net
If you have clinical coding queries in relation to ICD-10 and OPCS-4 find out more about the helpdesk submission process and service levels.