| HES | Hospital Episode Statistics for England (NHS Digital) |
| HESID | A unique patient pseudo-identifier assigned by NHS Digital to identify hospital episode records that relate to the same person |
| NCARDRS | National Congenital Anomaly and Rare Disease Registration Service (Public Health England) |
| NDSCR | National Down Syndrome Cytogenetic Register (Public Health England) |
| NHS | National Health Service |
| NHS Digital | Trading name of the Health and Social Care Information Centre |