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Series / Collection

Data on Written Complaints in the NHS

National statistics
Geographic Coverage:
Geographical Granularity:
Ambulance Trusts, Care Trusts, Clinical Commissioning Groups, Hospital and Community Health Services, Hospital Trusts, Hospital Sites, Independent Sector Health Care Providers, Mental Health Trusts, NHS Trusts, GP practices, Regions, Dental practices


These data are a count of written complaints made by or on behalf of patients about NHS services in England. They consist of data collections for complaints about NHS Hospital and Community Health Services (secondary care) and complaints about primary care (GP and Dental) services, with further detail on each below.

KO41a Hospital and Community Health Services (HCHS) secondary care complaints

These data are collected from HCHS secondary care providers via the KO41a collection. From 2015-16 to 2021-22 these data were collected and published for quarterly reporting periods. From 2022-23 these data will be collected and published on an annual basis.

KO41b primary care (GP and Dental) complaints

These data are collected from primary care (GP & Dental) providers via the annual KO41b collection.

Latest statistics

Past publications