The national NHS Classifications Service is responsible for the development and/or maintenance and implementation of the clinical classifications and associated standards in support of this objective:

• OPCS Classification of Interventions and Procedures OPCS-4
• International Statistical Classification of Diseases and Related Health Problems ICD-10

By implementing our national standards the NHS applies consistent data standards across the NHS.

As part of our national remit to ensure consistent application of the standards we provide the following resources to the NHS to ensure accurate data quality:

• National Clinical Classifications Helpdesk - delivered by the NHS Classifications Service based on our knowledge of key data
• National data quality audit framework - helping Trusts establish a robust and continuous cycle of quality data
• Clinical coding instruction manuals - for the NHS clinical coding workforce which clarify the national standards in clinical coding and are issued as part of our authorised  training courses and suite of national training materials
• Coding Clinic - the only technical manual advising of resolutions from the UK Coding Review Panel and thereby changes in the national standards in clinical coding
• Condition-specific workshop materials for accredited trainers
• Cross-maps - from terminologies to ICD-10 and OPCS-4.