| Abbreviation | Definition |
|---|---|
| UHR | Ultra High Risk |
| UHR | Underlying Health Reason |
| UICC | Union Internationale Contre le Cancer, aka Union for International Cancer Control, International Union Against Cancer |
| UKADCU | UK Anti-Drugs Co-ordination Unit (formerly Drugs Co-ordination Unit) |
| UKAN | United Kingdom Advocacy Network |
| UKCAT | UK Clinical Aptitude Test |
| UKCAT(picture)XX | United Kingdom Clinical Aptitude Test |
| UKCC | United Kingdom Central Council |
| UKCEAXX | UK Conference of Postgraduate Education Advisers in General Practice |
| UKCRC | UK Clinical Research Collaboration |
| UKDIPG | United Kingdom Drug Information Pharmacists Group |
| UKDRI | United Kingdom Dementia Research Institute |
| UKECA | UK Ethics Committee Authority |
| UKFPOXX | UK Foundation Programme Office |
| UKHFAN | United Kingdom Health for All Network |
| UKHSA | United Kingdom Health Security Agency |
| UKISS | United Kingdom Infentile Spasm Study |
| UKOLN | The UK Office for Library and Information Networking |
| UKPHA | United Kingdom Public Health Alliance |
| UKPHLS | UK Public Health Link System |