NJR Surgeon and Hospital Profile
Hospital

Hospital: Croydon University Hospital

Croydon Health Services NHS Trust
SURGEONS WITH ACTIVITY RECORDED IN NJR
Surgeon NameGMC CodeSurgeon’s Activity
Awaiz Ahmed6095640 H
Mohammed Al Maiyah5206732 H A
Anestis Iossifidis2903507 S
Avinash Prabhakar Joshi4679000 H
Christian John Kinmont3325434 H K
Michael Kotrba4581295 H
Kumaraparathan Kunasingam6031323 H
Shady Abdelghafar Hanafy Mahmoud7688801 H
Ravi Kanth Mallina6091572 H E
Christopher McLean4235587 H K
Arvind Mohan6063060 S
VENUNATHA NAIDU4345800 H
Efstratios Papanikos7745583 H K
Sarkhell Saadi Radha6121866 H K E S
Shin Jae Rhee6071480 H E S
Lazlo Zolczer4084217 H S
Key :
H Hip surgery
K Knee surgery
A Ankle surgery
E Elbow surgery
S Shoulder surgery
12-MONTH PRACTICE PROFILE (1 YEAR)
Data for 1 April 2025 - 31 March 2026
Operation Type Operation SubcategoryProcedures Recorded for this HospitalNational Average
Hip Revision-1123
Hip PrimaryHip hemiarthroplasty133163
Hip PrimaryTotal hip replacement20294
Knee Revision-Fewer Than 518
Ankle Primary-78
Elbow Primary-66
Shoulder Primary-2230
           Total199+542
36-MONTH PRACTICE PROFILE (3 YEAR)
Data for 1 April 2023 - 31 March 2026
Operation Type Operation SubcategoryProcedures Recorded for this HospitalNational Average
Hip PrimaryHip hemiarthroplasty333373
Hip PrimaryTotal hip replacement48868
Hip Revision-4363
Knee PrimaryTotal knee replacementFewer Than 5852
Knee Revision-951
Ankle Primary-919
Elbow Primary-1714
Shoulder Primary-6481
           Total523+2321
HIPS
PATIENT OUTCOMES

This information display shows you how this hospital compares to the national rates for a range of patient outcomes measures used to demonstrate quality in joint replacement surgery. Against each measure you will be able to see whether this hospital is performing better than expected, within the expected range, or worse than expected for this type of surgery. This hospital is represented on the chart by a red triangle.

It is important to note that the types of patients a hospital treats and the procedures it carries out can explain variation in patient outcomes after surgery. Please click on the “How to interpret this chart” button for further information.

 
Patient outcomes

Patient outcomes, featured in this second chart below, looks at mortality and revision. Please click on the “How to interpret this chart” button for further information including additional notes on factors that may affect the results shown including whether the hospital is providing a full and accurate submission of first-time joint replacement and revision operation data to the NJR.

Data for February 2016 - February 2026


Click on the   to find out more about the quality measure and its source data
 

Patient Outcomes Quality MeasureThis Hospital Patient Records AnalysedThis Hospital RatioNational Ratio
0
1
2
3
4
5
90 Day Mortality: Operations February 2021 - February 2026Inside control limits120.911.00
Revision Rate: Operations February 2016 - February 2026Inside control limits1571.801.00
Revision Rate: Operations February 2021 - February 2026Inside control limits830.421.00
 
ABOUT THE PATIENTS WHO WERE TREATED

This information display shows overall characteristics for first-time hip replacement patients treated at this hospital between 1 April 2003 and 31 March 2026. Against each characteristic you will be able to see whether this hospital has treated a greater or fewer number of patients of a particular type. This hospital is represented on the chart by the black marker ().

The types of patients a hospital treats can explain variation in patient outcomes after surgery. Please click on the “How to interpret this chart” button for further information.

For hospitals in England and Wales, the NJR has collected information since 2003. For Northern Ireland since 2013, for the Isle of Man since 2015, for Guernsey since 2019 and for Jersey since 2025.

Data for 1 April 2003 - 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Percentage Of Patients Who Were:This HospitalNational Average
Male31%40%
Under 60 years of age7%20%
Severely Obese (BMI of 35 or greater)4%13%
At higher risk of medical problems before or after Surgery (ASA 3+)62%22%
Diagnosed with conditions other than Osteoarthritis97%14%
NHS-funded99%81%
 
90-DAY MORTALITY
Data for February 2021 to February 2026 Hospital risk adjusted 90-day mortality

What does this mean?

This shows 90-day mortality following hip surgery for this hospital, based on the type of patients this hospital has seen.

The hospital you are reviewing is highlighted as an orange triangle. Progression along the horizontal axis (x axis) means that the hospital has done more cases and/or cases at a higher mortality risk such as older patients. Progression along the vertical axis (y axis) means the hospital has had more deaths.

The vertical axis figures are presented as a standardised mortality ratio. This means the values do not represent percentages of patients who have died, but they represent the proportion of deaths compared to the national average. The data is also ‘risk adjusted’ to take account of the fact that different hospitals may operate on more higher-risk or lower-risk patients e.g. because of demographics in the patient population they work with.

  • Hospitals on the central (green) horizontal line (at national average ratio figure of 1) have had exactly the average expected mortality
  • Hospitals either side of the central green line but below the upper red line have had a level of mortality that is within the expected range
  • Any hospitals that appear above the top red line which represents a Control limit (99.8%) have a mortality rate that is higher than expected

KNEES
PATIENT OUTCOMES

This information display shows you how this hospital compares to the national rates for a range of patient outcomes measures used to demonstrate quality in joint replacement surgery. Against each measure you will be able to see whether this hospital is performing better than expected, within the expected range, or worse than expected for this type of surgery. This hospital is represented on the chart by a red triangle.

It is important to note that the types of patients a hospital treats and the procedures it carries out can explain variation in patient outcomes after surgery. Please click on the “How to interpret this chart” button for further information.

 
Patient outcomes

Patient outcomes, featured in this second chart below, looks at mortality and revision. Please click on the “How to interpret this chart” button for further information including additional notes on factors that may affect the results shown including whether the hospital is providing a full and accurate submission of first-time joint replacement and revision operation data to the NJR.

Data for February 2016 - February 2026


Click on the   to find out more about the quality measure and its source data
 

Patient Outcomes Quality MeasureThis Hospital Patient Records AnalysedThis Hospital RatioNational Ratio
0
1
2
3
4
5
90 Day Mortality: Operations February 2021 - February 2026Inside control limitsFewer Than 50.961.00
Revision Rate All Knees: Operations February 2016 - February 2026Inside control limits90.811.00
Revision Rate Total Knee replacement: Operations February 2016 - February 2026Inside control limits90.801.00
Revision Rate Unicondylar Knees: Operations February 2016 - February 2026No Data AvailableNo Data Available--
Revision Rate: Operations February 2021 - February 2026Inside control limits80.811.00
 
ABOUT THE PATIENTS WHO WERE TREATED

This information display shows overall characteristics for first-time knee replacement patients treated at this hospital between 1 April 2003 and 31 March 2026. Against each characteristic you will be able to see whether this hospital has treated a greater or fewer number of patients of a particular type. This hospital is represented on the chart by the black marker ().

The types of patients a hospital treats can explain variation in patient outcomes after surgery.

For hospitals in England and Wales, the NJR has collected information since 2003. For Northern Ireland since 2013, for the Isle of Man since 2015, for Guernsey since 2019 and for Jersey since 2025.

Please click on the “How to interpret this chart” button for further information.

Data for 1 April 2003 - 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Percentage Of Patients Who Were:This HospitalNational Average
Male12%44%
Under 60 years of age0%16%
Severely Obese (BMI of 35 or greater)10%23%
At higher risk of medical problems before or after Surgery (ASA 3+)45%19%
Diagnosed with conditions other than Osteoarthritis42%4%
NHS-funded77%84%
 
ANKLES
ABOUT THE PATIENTS WHO WERE TREATED

This information display shows overall characteristics for first-time ankle replacement patients treated at this hospital between 1 April 2010 and 31 March 2026. Against each characteristic you will be able to see whether this hospital has treated a greater or fewer number of patients of a particular type. This hospital is represented on the chart by the black marker ().

The types of patients a hospital treats can explain variation in patient outcomes after surgery.

Note: Data submission for Northern Ireland hospitals started in February 2013, for the Isle of Man in July 2015, for Guernsey in November 2019 and for Jersey since 2025.

Please click on the “How to interpret this chart” button for further information.

Data for 1 April 2010 - 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Percentage Of Patients Who Were:This HospitalNational Average
Male73%61%
Under 60 years of age36%19%
Severely Obese (BMI of 35 or greater)20%14%
At higher risk of medical problems before or after Surgery (ASA 3+)27%19%
Diagnosed with conditions other than Osteoarthritis18%11%
NHS-funded100%81%
 
ELBOWS
ABOUT THE PATIENTS WHO WERE TREATED

This information display shows overall characteristics for first-time elbow replacement patients treated at this hospital between 1 April 2012 and 31 March 2026. Against each characteristic you will be able to see whether this hospital has treated a greater or fewer number of patients of a particular type. This hospital is represented on the chart by the black marker ().

The types of patients a hospital treats can explain variation in patient outcomes after surgery.

Note: Data submission for Northern Ireland hospitals started in February 2013, for the Isle of Man in July 2015, for Guernsey in November 2019 and for Jersey since 2025.

Note: BMI data submission for Elbows started in June 2018.

Please click on the How to interpret this chart button for further information.

Data for 1 April 2012 - 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Percentage Of Patients Who Were:This HospitalNational Average
Male52%33%
Under 60 years of age65%39%
Severely Obese (BMI of 35 or greater)14%18%
At higher risk of medical problems before or after Surgery (ASA 3+)13%28%
Diagnosed with conditions other than Osteoarthritis100%88%
NHS-funded100%97%
 
SHOULDERS
ABOUT THE PATIENTS WHO WERE TREATED

This information display shows overall characteristics for first-time shoulder replacement patients treated at this hospital between 1 April 2012 and 31 March 2026. Against each characteristic you will be able to see whether this hospital has treated a greater or fewer number of patients of a particular type. This hospital is represented on the chart by the black marker ().

The types of patients a hospital treats can explain variation in patient outcomes after surgery.

Note: Data submission for Northern Ireland hospitals started in February 2013, for the Isle of Man in July 2015, for Guernsey in November 2019 and for Jersey since 2025.

Note: BMI data submission for Elbows started in June 2018.

Please click on the How to interpret this chart button for further information.

Data for 1 April 2012 - 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Percentage Of Patients Who Were:This HospitalNational Average
Male32%31%
Under 60 years of age15%11%
Severely Obese (BMI of 35 or greater)20%18%
At higher risk of medical problems before or after Surgery (ASA 3+)36%33%
Diagnosed with conditions other than Osteoarthritis41%48%
NHS-funded100%89%
 
QUALITY OF THE INFORMATION SUBMITTED BY THIS HOSPITAL

This information display shows whether this hospital is submitting all the data they should to the NJR (compliance), whether those records have corresponding patient details (patient consent) and whether the records have a valid NHS or national patient number. This is important so that the NJR can measure how long implants last and look at other areas of surgical performance.

The display also shows a result for data entry delay. This indicates whether the hospital is submitting their information in a timely way. This is important so that the NJR can report an accurate and full picture of performance to hospitals, the surgeons who work there as well as to patients and the public.

This hospital is represented on the chart by the black marker (). Please click on the “How to interpret this chart” button for further information.

Compliance data for 1 January 2025 – 31 December 2025

All other data for 1 April 2025 – 31 March 2026


Click on the   to find out more about the quality measure and its source data
 

Quality Measure This HospitalNational Expected
Compliance (for the Trust)Better Than Expected100.0%95.0%
Revision Compliance (for the Trust)Better Than Expected100.0%95.0%
Trauma consent rateAs Expected78.9%90.0%
Elective consent rateAs Expected87.8%90.0%
Valid NHS numberBetter Than Expected97.4%95.0%
Time taken to enter dataBetter Than Expected3 Days30 Days
 
Window
If there is no profile for an individual surgeon it is likely to be because of concerns about the accuracy of the data originally supplied to the NJR and it has, therefore, been decided not to publish this surgeon's data.

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