A knee replacement replaces damaged parts of the knee joint with metal or plastic parts. It can replace the whole joint (total knee replacement) or part of it (partial knee replacement). It is most often done for pain and stiffness caused by osteoarthritis, when other treatments have not helped.
Full recovery can take several months or more, and a knee replacement can last for 25 years. All knee replacements in England, NHS and private, are recorded in the National Joint Registry, which publishes outlier status for revision (repeat surgery) rates for total, partial (unicondylar) and kneecap (patellofemoral) replacements.
London hospitals
60 London hospitals with published figures. Sorted by name. This is not a ranking: read how to read this first.
The NJR open data gives one total per hospital for all joint replacements (hips, knees, ankles, elbows and shoulders) together. It does not split hips from knees.
| Hospital | Volume bandJoint replacements, all joints, 2025 (NJR) | Key outcomeNJR outlier status | Waiting timeWhole trust | Patient experience | CQC rating |
|---|---|---|---|---|---|
| Barnet General HospitalNHS · Royal Free London NHS Foundation Trust | Fewer than 400240 joint replacements of all kinds recorded in 2025Earlier years: 2023: 46, 2024: 231 | Not identified as an outlierMore measures
| 16.3 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 54.4% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Barnet General Hospital) |
| Bishops Wood HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400326 joint replacements of all kinds recorded in 2025Earlier years: 2023: 348, 2024: 287 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Bishops Wood Hospital) |
| The Blackheath HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749692 joint replacements of all kinds recorded in 2025Earlier years: 2023: 581, 2024: 622 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Blackheath Hospital) |
| The Cavell HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749646 joint replacements of all kinds recorded in 2025Earlier years: 2023: 608, 2024: 704 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Cavell Hospital) |
| Central Middlesex HospitalNHS · London North West University Healthcare NHS Trust | 1,000 or more1,610 joint replacements of all kinds recorded in 2025Earlier years: 2023: 592, 2024: 1,021 | Not identified as an outlierMore measures
| 15 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 59.5% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Central Middlesex Hospital) |
| Charing Cross HospitalNHS · Imperial College Healthcare NHS Trust | 400 to 749523 joint replacements of all kinds recorded in 2025Earlier years: 2023: 575, 2024: 496 | Not identified as an outlierMore measures
| 12.6 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 64.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.4 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Charing Cross Hospital) |
| Chase Farm HospitalNHS · Royal Free London NHS Foundation Trust | 750 to 999833 joint replacements of all kinds recorded in 2025Earlier years: 2023: 778, 2024: 915 | Not identified as an outlierMore measures
| 16.3 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 54.4% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Chase Farm Hospital) |
| Chelsea and Westminster HospitalNHS · Chelsea and Westminster Hospital NHS Foundation Trust | Fewer than 400394 joint replacements of all kinds recorded in 2025Earlier years: 2023: 373, 2024: 418 | Not identified as an outlierMore measures
| 15.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 55.7% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.2 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Chelsea and Westminster Hospital) |
| Chelsfield Park HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749685 joint replacements of all kinds recorded in 2025Earlier years: 2023: 611, 2024: 650 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Chelsfield Park Hospital) |
| The Clementine Churchill HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 750 to 999799 joint replacements of all kinds recorded in 2025Earlier years: 2023: 618, 2024: 802 | Identified as an outlier: Total knee 5-year revisionEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Clementine Churchill Hospital) |
| Cleveland Clinic London HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749709 joint replacements of all kinds recorded in 2025Earlier years: 2023: 428, 2024: 606 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Cleveland Clinic London Hospital) |
| Cromwell HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400183 joint replacements of all kinds recorded in 2025Earlier years: 2023: 204, 2024: 132 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Cromwell Hospital) |
| Croydon University HospitalNHS · Croydon Health Services NHS Trust | Fewer than 400209 joint replacements of all kinds recorded in 2025Earlier years: 2023: 133, 2024: 210 | Not identified as an outlierMore measures
| 9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 80.1% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Croydon University Hospital) |
| Ealing HospitalNHS · London North West University Healthcare NHS Trust | Fewer than 40087 joint replacements of all kinds recorded in 2025Earlier years: 2023: 7, 2024: 43 | Not identified as an outlierMore measures
| 15 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 59.5% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Ealing Hospital) |
| The Fitzrovia HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Not published (small numbers) | No hospital-level outcome data published | Not published for private hospitals | Not covered by NHS patient surveys | No rating |
| Guy's HospitalNHS · Guy's and St Thomas' NHS Foundation Trust | 1,000 or more1,016 joint replacements of all kinds recorded in 2025Earlier years: 2023: 737, 2024: 901 | Identified as an outlier: Total knee 10-year revisionMore measures
| 13.7 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.4% waiting under 18 weeks (August 2026) | Better than expectedInpatients rated their overall experience 8.8 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Guy's Hospital) |
| Hendon HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 4002 joint replacements of all kinds recorded in 2025 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Hendon Hospital) |
| Highgate HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400134 joint replacements of all kinds recorded in 2025Earlier years: 2023: 108, 2024: 133 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Highgate Hospital) |
| The Hillingdon HospitalNHS · The Hillingdon Hospitals NHS Foundation Trust | Fewer than 400233 joint replacements of all kinds recorded in 2025Earlier years: 2023: 136, 2024: 196 | Identified as an outlier: Total knee 10-year revisionMore measures
| 14.2 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 59.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for The Hillingdon Hospital) |
| Homerton University HospitalNHS · Homerton Healthcare NHS Foundation Trust | Fewer than 400302 joint replacements of all kinds recorded in 2025Earlier years: 2023: 218, 2024: 201 | Not identified as an outlierMore measures
| 14.8 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 58.7% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 7.9 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Outstanding (CQC report for Homerton University Hospital) |
| Hospital of St John & St ElizabethPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400172 joint replacements of all kinds recorded in 2025Earlier years: 2023: 193, 2024: 212 | Identified as an outlier: Total knee 10-year revisionEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Hospital of St John & St Elizabeth) |
| King Edward VII’s HospitalPrivate hospitalThe NJR file flags this hospital on 8 of its 9 outlier measures. No other UK hospital is flagged on more than 4. The same pattern appears in the 2023, 2024 and 2025 files, and the file columns line up correctly, so this is how the NJR published it rather than a reading error on our part. Revision measures look back up to 10 years, so they reflect operations done in earlier years. We have asked the NJR to confirm.Private hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400393 joint replacements of all kinds recorded in 2025Earlier years: 2023: 609, 2024: 465 | Identified as an outlier: Total knee 5-year revision; Total knee 10-year revision; Unicondylar knee 5-year revision; Unicondylar knee 10-year revision; Patellofemoral knee 5-year revision; Patellofemoral knee 10-year revisionEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for King Edward VII’s Hospital) |
| King George HospitalNHS · Barking, Havering and Redbridge University Hospitals NHS Trust | 750 to 999810 joint replacements of all kinds recorded in 2025Earlier years: 2023: 704, 2024: 814 | Not identified as an outlierMore measures
| 15.1 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 60% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for King George Hospital) |
| King's College HospitalNHS · King's College Hospital NHS Foundation Trust | Fewer than 40040 joint replacements of all kinds recorded in 2025Earlier years: 2023: 27, 2024: 1 | Not identified as an outlierMore measures
| 13.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.1 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for King's College Hospital) |
| The Kings Oak HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 40048 joint replacements of all kinds recorded in 2025Earlier years: 2023: 22, 2024: 5 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Kings Oak Hospital) |
| Kingston HospitalNHS · Kingston and Richmond NHS Foundation Trust | Fewer than 400216 joint replacements of all kinds recorded in 2025Earlier years: 2023: 146, 2024: 222 | Not identified as an outlierMore measures
| 16 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 56.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Kingston Hospital) |
| The Lister HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400243 joint replacements of all kinds recorded in 2025Earlier years: 2023: 293, 2024: 276 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Outstanding (CQC report for The Lister Hospital) |
| London Bridge HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 750 to 999770 joint replacements of all kinds recorded in 2025Earlier years: 2023: 807, 2024: 786 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Outstanding (CQC report for London Bridge Hospital) |
| The London ClinicPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400127 joint replacements of all kinds recorded in 2025Earlier years: 2023: 227, 2024: 187 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The London Clinic) |
| The London Independent HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400281 joint replacements of all kinds recorded in 2025Earlier years: 2023: 321, 2024: 314 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The London Independent Hospital) |
| Mount Vernon HospitalNHS · The Hillingdon Hospitals NHS Foundation Trust | 400 to 749408 joint replacements of all kinds recorded in 2025Earlier years: 2023: 471, 2024: 475 | Identified as an outlier: Total knee 10-year revisionMore measures
| 14.2 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 59.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Mount Vernon Hospital) |
| The New Victoria HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400238 joint replacements of all kinds recorded in 2025Earlier years: 2023: 197, 2024: 209 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The New Victoria Hospital) |
| North Middlesex University HospitalNHS · Royal Free London NHS Foundation Trust | Fewer than 400328 joint replacements of all kinds recorded in 2025Earlier years: 2023: 236, 2024: 292 | Not identified as an outlierMore measures
| 16.3 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 54.4% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for North Middlesex University Hospital) |
| Northwick Park HospitalNHS · London North West University Healthcare NHS Trust | Fewer than 400284 joint replacements of all kinds recorded in 2025Earlier years: 2023: 82, 2024: 152 | Not identified as an outlierMore measures
| 15 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 59.5% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Northwick Park Hospital) |
| Orpington HospitalNHS · King's College Hospital NHS Foundation Trust | 750 to 999979 joint replacements of all kinds recorded in 2025Earlier years: 2023: 685, 2024: 793 | Not identified as an outlierMore measures
| 13.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.1 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Orpington Hospital) |
| Parkside HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749425 joint replacements of all kinds recorded in 2025Earlier years: 2023: 395, 2024: 384 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Parkside Hospital) |
| The Portland HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Not published (small numbers) | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Portland Hospital) |
| Practice Plus Group Hospital, IlfordPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 750 to 999756 joint replacements of all kinds recorded in 2025Earlier years: 2023: 717, 2024: 733 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Practice Plus Group Hospital, Ilford) |
| The Princess Grace HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749634 joint replacements of all kinds recorded in 2025Earlier years: 2023: 639, 2024: 548 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Princess Grace Hospital) |
| Princess Royal University HospitalNHS · King's College Hospital NHS Foundation Trust | Fewer than 400150 joint replacements of all kinds recorded in 2025Earlier years: 2023: 59, 2024: 62 | Not identified as an outlierMore measures
| 13.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.1 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Princess Royal University Hospital) |
| Queen Elizabeth HospitalNHS · Lewisham and Greenwich NHS Trust | Fewer than 400122 joint replacements of all kinds recorded in 2025Earlier years: 2023: 11, 2024: 53 | Not identified as an outlierMore measures
| 13 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 62.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 7.9 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for Queen Elizabeth Hospital) |
| Queen's HospitalNHS · Barking, Havering and Redbridge University Hospitals NHS Trust | Fewer than 400299 joint replacements of all kinds recorded in 2025Earlier years: 2023: 94, 2024: 318 | Not identified as an outlierMore measures
| 15.1 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 60% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.6 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Queen's Hospital) |
| The Royal Free HospitalNHS · Royal Free London NHS Foundation Trust | Fewer than 400203 joint replacements of all kinds recorded in 2025Earlier years: 2023: 59, 2024: 42 | Not identified as an outlierMore measures
| 16.3 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 54.4% waiting under 18 weeks (August 2026) | Worse than expectedInpatients rated their overall experience 7.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for The Royal Free Hospital) |
| The Royal London HospitalNHS · Barts Health NHS Trust | Fewer than 400195 joint replacements of all kinds recorded in 2025Earlier years: 2023: 188, 2024: 254 | Not identified as an outlierMore measures
| 15.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 55.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.2 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for The Royal London Hospital) |
| The Royal National Orthopaedic Hospital, StanmoreNHS · Royal National Orthopaedic Hospital NHS Trust | 1,000 or more1,232 joint replacements of all kinds recorded in 2025Earlier years: 2023: 1,102, 2024: 1,202 | Identified as an outlier: Total knee 10-year revisionMore measures
| 9.1 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 77.9% waiting under 18 weeks (August 2026) | Somewhat better than expectedInpatients rated their overall experience 8.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for The Royal National Orthopaedic Hospital, Stanmore) |
| The Shirley Oaks HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400261 joint replacements of all kinds recorded in 2025Earlier years: 2023: 205, 2024: 223 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Shirley Oaks Hospital) |
| The Sloane HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Not published (small numbers) | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Sloane Hospital) |
| Spire London East HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 400283 joint replacements of all kinds recorded in 2025Earlier years: 2023: 240, 2024: 294 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Spire London East Hospital) |
| St Anthony's HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749522 joint replacements of all kinds recorded in 2025Earlier years: 2023: 580, 2024: 532 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for St Anthony's Hospital) |
| St George's Hospital, TootingNHS · St George's University Hospitals NHS Foundation Trust | Fewer than 400232 joint replacements of all kinds recorded in 2025Earlier years: 2023: 119, 2024: 210 | Not identified as an outlierMore measures
| 11.7 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 67.8% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.3 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for St George's Hospital, Tooting) |
| St Helier Hospital and Queen Mary's Hospital for ChildrenNHS · Epsom and St Helier University Hospitals NHS Trust | Fewer than 400193 joint replacements of all kinds recorded in 2025Earlier years: 2023: 34, 2024: 28 | Not identified as an outlierMore measures
| 13.4 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.9% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 7.9 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for St Helier Hospital and Queen Mary's Hospital for Children) |
| St Mary's HospitalNHS · Imperial College Healthcare NHS Trust | Fewer than 400196 joint replacements of all kinds recorded in 2025 | Not identified as an outlierMore measures
| 12.6 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 64.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.4 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for St Mary's Hospital) |
| St Thomas' HospitalNHS · Guy's and St Thomas' NHS Foundation Trust | Fewer than 400172 joint replacements of all kinds recorded in 2025Earlier years: 2023: 71, 2024: 174 | Not identified as an outlierMore measures
| 13.7 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 61.4% waiting under 18 weeks (August 2026) | Better than expectedInpatients rated their overall experience 8.8 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for St Thomas' Hospital) |
| University College Hospital & Elizabeth Garrett Anderson WingNHS · University College London Hospitals NHS Foundation Trust | 1,000 or more1,638 joint replacements of all kinds recorded in 2025Earlier years: 2023: 1,516, 2024: 1,784 | Not identified as an outlierMore measures
| 9.1 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 73.7% waiting under 18 weeks (August 2026) | Better than expectedInpatients rated their overall experience 8.7 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for University College Hospital & Elizabeth Garrett Anderson Wing) |
| University Hospital LewishamNHS · Lewisham and Greenwich NHS Trust | 400 to 749698 joint replacements of all kinds recorded in 2025Earlier years: 2023: 444, 2024: 560 | Not identified as an outlierMore measures
| 13 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 62.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 7.9 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for University Hospital Lewisham) |
| The Wellington HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | 400 to 749489 joint replacements of all kinds recorded in 2025Earlier years: 2023: 427, 2024: 472 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for The Wellington Hospital) |
| West Middlesex University HospitalNHS · Chelsea and Westminster Hospital NHS Foundation Trust | Fewer than 400397 joint replacements of all kinds recorded in 2025Earlier years: 2023: 305, 2024: 467 | Not identified as an outlierMore measures
| 15.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 55.7% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.2 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Good (CQC report for West Middlesex University Hospital) |
| Weymouth HospitalPrivate hospitalPrivate hospital: NJR figures include privately funded and NHS-funded operations. | Fewer than 40052 joint replacements of all kinds recorded in 2025Earlier years: 2023: 27, 2024: 39 | Not identified as an outlierEach NJR measure
| Not published for private hospitals | Not covered by NHS patient surveys | Good (CQC report for Weymouth Hospital) |
| Whipps Cross University HospitalNHS · Barts Health NHS Trust | Fewer than 400352 joint replacements of all kinds recorded in 2025Earlier years: 2023: 190, 2024: 364 | Not identified as an outlierMore measures
| 15.9 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 55.5% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.2 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for Whipps Cross University Hospital) |
| The Whittington HospitalNHS · Whittington Health NHS Trust | Fewer than 400109 joint replacements of all kinds recorded in 2025Earlier years: 2024: 107 | Not identified as an outlierMore measures
| 8.5 weeksHalf of people waiting for trauma and orthopaedics had waited less than this. 78.1% waiting under 18 weeks (August 2026) | About the same as other trustsInpatients rated their overall experience 8.2 out of 10 (CQC Adult Inpatient Survey 2025, whole trust) | Requires improvement (CQC report for The Whittington Hospital) |
Across England
In 2025-26, NHS-funded care in England (NHS hospitals and NHS patients treated by independent providers; private patients are not included) recorded 103,876 episodes where the main procedure was total knee replacement (OPCS-4 W40 to W42). 2% were day cases. Half of the people admitted from a waiting list had waited less than about 134 days from the decision to admit them. These are national figures from Hospital Episode Statistics (NHS England, 2025-26, Open Government Licence v3.0); the same detail is not published for each hospital.
Hospitals identified as outliers across the UK in the NJR 2025 file (out of 403): Total Knee 5-year revision: 8; Total Knee 10-year revision: 25; Unicondylar Knee 5-year revision: 2; Unicondylar Knee 10-year revision: 5; Patellofemoral Knee 5-year revision: 1; Patellofemoral Knee 10-year revision: 1.
How to read this
- Not a ranking. The table is in alphabetical order. A higher volume does not on its own mean better care, and we do not combine the columns into a score.
- Volume bands. Cut points are the lower quartile, median and upper quartile of all 398 hospitals that reported to the NJR in 2025 in the published table, rounded. So about a quarter of hospitals that reported to the NJR in 2025 fall in each band. The exact number is shown under the band.
- Risk adjustment. Where a figure says “adjusted”, the audit has allowed for differences in the patients each hospital treats, such as age and other illnesses. Hospitals that take on more complex cases can still look different for reasons the adjustment does not capture.
- Bands and limits. We only say a result is higher or lower than expected when the source itself says so (for example NJR outlier status, NELA funnel limits, SSNAP levels, CQC survey bands). Where the source publishes a rate without limits we show the rate and the national figure, and say “No banding published”.
- Small numbers. A small hospital can have 0% or a high percentage by chance. Figures the source suppresses are shown as “Not published (small numbers)”.
- Trust or hospital. Volumes and outcomes here are for each hospital or team, but waiting times and the CQC inpatient survey are for the whole trust.
- Different periods. Each figure has its own period, shown next to it. Audit results describe operations done one to three years ago; waiting times are updated monthly.
- Private hospitals. NHS waiting times and NHS patient surveys do not cover private hospitals. Private hospital data published by PHIN cannot be republished here without a licence.
- Talk to your GP or consultant about what the figures mean for you. If you are referred for planned care in England, you can usually choose your hospital.
Full definitions: methodology and data dictionary.
Data sources and licences
- National Joint Registry (NJR) transparency data, National Joint Registry / HQIP. Source: National Joint Registry (NJR) transparency data, via data.gov.uk. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0
- Consultant-led Referral to Treatment Waiting Times, NHS England. Source: NHS England, Referral to Treatment waiting times. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0
- CQC Adult Inpatient Survey 2025 (trust benchmark results), Care Quality Commission. Source: Care Quality Commission, NHS Patient Survey Programme, Adult Inpatient Survey 2025. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0
- CQC ratings, Care Quality Commission. CQC ratings: Care Quality Commission. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0
- Healthcare-associated infections: annual counts and rates by trust (financial year 2025 to 2026), UK Health Security Agency. Source: UK Health Security Agency, healthcare-associated infection annual data. Contains public sector information licensed under the Open Government Licence v3.0. Open Government Licence v3.0
Data last updated 22 October 2026. We do not change the published figures; we only group volumes into bands. Spotted a mistake? Tell us.
Sources
We checked this guide against these official pages on 22 October 2026.
- Knee replacement: what is a knee replacement? (NHS website)
- Knee replacement: recovery (NHS website)
- National Joint Registry transparency data (data.gov.uk) (National Joint Registry)
- Hospital Admitted Patient Care Activity 2025-26 (NHS England)
- Consultant-led Referral to Treatment Waiting Times 2026-27 (NHS England)
- Adult inpatient survey (Care Quality Commission)
Spotted something out of date? Tell us.