Hospital Episode Statistics Outpatients (HES OP)

Agreements naming it

516

In term in September 2026

357

Organisations

258

Files released

10,009

Files released counts only files released externally by DARS. Access granted in NHS England's own systems, such as its Secure Data Environment, is not included.

How the register describes it

Recorded against the dataset on each agreement, and not always the same from one agreement to the next, so every value found is listed.

Type of data

• Anonymised - ICO Code Compliant
• Identifiable

Sensitivity

• Non-Sensitive
• Sensitive

Frequency of release

• Frequent Adhoc Flow
• One-Off
• Ongoing
• System Access

Legal basis for provision

• CV19: Regulation 3 (4) of the Health Service (Control of Patient Information) Regulations 2002
• Consent (Reasonable Expectation)
• Health and Social Care Act 2012 - s261 - 'Other dissemination of information'
• Health and Social Care Act 2012 - s261(2)(d)
• Health and Social Care Act 2012 - s261(5)(c)
• Health and Social Care Act 2012 - s261(5)(d)
• Health and Social Care Act 2012 – s261(2)(a)
• Health and Social Care Act 2012 – s261(2)(b)(ii)

19 more

• Health and Social Care Act 2012 – s261(2)(c)
• Health and Social Care Act 2012 – s261(4)
• Health and Social Care Act 2012 – s261(7)
• Informed Patient consent to permit the receipt, processing and release of data by NHS Digital
• National Audit Act 1983
• National Health Service Act 2006 - s251 - 'Control of patient information'.
• Other-(section 45C of the SRSA 2007, as amended by the Digital Economy Act (2017))
• Other-Data dissemination is mandated under section 45c of the Statistics and Registration Service Act (2007) as amended by the Digital Economy Act 2017
• Other-For one subset of the cohort the data is disseminated under Health and Social Care Act 2012 - s261(7) and National Health Service Act 2006 - s251 - 'Control of patient information'. For the remainder of the cohort the data is disseminated under Health and Social Care Act 2012 - s261(2)(c).
• Other-Health and Social Care Act 2012 - s.261(2)(b)(ii)
• Other-Health and Social Care Act 2012 - s261(2)(a)
• Other-Health and Social Care Act 2012 - s261(2)(b)(ii)
• Other-Health and Social Care Act S261(2)(b)(ii)
• Other-Informed Parental Consent
• Other-National Audit Act 1983
• Other-National Health Service Act 2006 - s251 - 'Control of patient information'
• Other-Regulation 3 of The Health Service (Control of Patient Information) Regulations 2002
• Other-Section 45C of the SRSA 2007, as amended by the Digital Economy Act (2017)
• Other-Section 45a of the Statistics and Registration Service Act (2007) as amended by the Digital Economy Act (2017)

Organisations whose agreements name it (258)

Agreements covering this dataset

Showing all 516 agreements.

Files: files of this dataset released under the agreement, across all its versions.

No longer in the register (4)

Agreements naming this dataset that earlier editions listed and the September 2026 edition does not. Each page shows what the register last said. None is counted in this site's figures.