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KO41A Hospital and Community Health Services Complaints Collection

Frequency: Quarterly


Access Data on Written Complaints in the NHS


Background to the collection

The Hospital and Community Health Services Complaints Collection (KO41a) has been accepted by the Standardisation Committee for Care Information (SCCI) and is now mandatory.

All NHS organisations and those delivering NHS services are required to submit Quarterly returns to NHS Digital.

The information obtained from the KO41a collection monitors written hospital and community health service complaints received by the NHS. It also supports the commitment given in equity and excellence to improve the patient experience by listening to the public voice. The data required for this collection is as follows:

  • section 1: organisation details and organisation site details 
  • section 2: Summary of overall numbers of complaints
  • section 3: Age of patient         
  • section 4: Status of complainant
  • section 5: Service area
  • section 6: Subject area of clinical treatment with sub-categories
  • section 7: Subject area
  • section 8: Profession

Launch and submission dates 2021 - 2022

Reporting period

Submission start date 

Submission end date 

Q1: 1 April 2021 to 30 June 2021

4 October 2021

19 November 2021 

Q2: 1 July 2021 to 30 September 2021

4 October 2021

19 November 2021

SDCS data collection system

Last edited: 8 July 2021 10:00 am