Hospital Episodes Statistics (HES) is a data warehouse containing records of all patients admitted to NHS hospitals in England. It contains details of inpatient care, outpatient appointments and A&E attendance records.
Hospital episode statistics (HES) statistics are produced and published on a monthly basis. This data is provisional and should therefore be treated as an estimate until the final National Statistics annual publications.
Please note, data quality notes are no longer made available in a PDF file. Instead they are available in the Excel file "HES Data Quality Notes", which can be accessed via the link shown under 'Related Links' below.