UK Health Dimensions

Data Providing Organisation:
Facts and Dimensions LTD

Data Providing Type:
Reference data (WIMD, read codes, etc)



Intended for the NHS and other users of health data.

Data Collection Method

Obtained from various reference data providers, including NHS TRUD, WHO, Organisation Data Service, and NHS England data dictionary.

Data Highlights

Key reference datasets of interest to SAIL researchers include version 2 and version 3 Read codes, ICD10 codes, cross-coding system mappings, organisational information, and geographic information.

Access Requirements

As a core SAIL dataset available in accordance with our standard Information Governance procedure.

More Information

A large collection of NHS and other health-related reference data from various sources, provided as a service to users of UK health data. It is regularly updated and tested. More information can be found at


Thousands of tables

Data Level

Aggregate, publicly available data

Data Years

Varies by data source. Historical changes in reference data are captured where possible

SAIL Schema