Knee Specialist London

Mr. Sam Rajaratnam FRCS (Tr. & Ortho) is a consultant orthopaedic surgeon and is regarded as being one of London’s leading knee specialists.

He has recently been appointed  Head of Department – Knee Surgery at the new Schoen Clinic in Wigmore Street, London in the Harley Street Medical area.

He also treats a number of patients at the Horder Centre in East Sussex, which is a centre of excellence for Orthopaedic Care in the South East with an outstanding grading by the Care Quality Commission (CQC).

Mr. Rajaratnam is highly regarded as one of the best knee surgeons for knee joint replacement, and performs amongst the highest number of knee replacement operations on the UK National Joint Registry each year with excellent outcomes (he performs approximately 400-500 Joint replacements annually).


Sam has great expertise in treating soft tissue injuries to the knee and treats a number of high profile sportsmen and sportswomen regularly at his knee clinic in London

He is passionate about rapid recovery following Knee Surgery and regularly lectures internationally on the subject. He is also a strong advocate of transparent, outcome measure driven healthcare in Knee Surgery and is excited about developing this further as Head of Department at Schoen Clinic, London.

Mr. Rajaratnam strongly believes in a multidisciplinary team approach to achieving best results. He has thus developed a team of specialist orthopaedic anaesthetists, physiotherapists, surgical assistants and nurses who are all highly experienced practitioners in their own right, and together they are able to deliver optimised and protocol based care following Knee Surgery at the knee clinic in London.

Mr. Rajaratnam is also very experienced in treating soft tissue injuries of the knee and sees a number of high profile sportsmen and sportswomen regularly.  He has developed rapid recovery techniques to enable the vast majority of patients to return home from the knee clinic within a few hours of their Knee Ligament or Cartilage Surgery.

He believes in Joint preservation and cartilage repair procedures of the knee and is a member of the International Cartilage Repair Society (ICRS).

A leading knee specialist, Mr. Rajaratnam considers that the most exciting advances in knee surgery are likely to involve the use of biological repair mechanisms and stem-cell therapy to the knee. He is currently working with industry experts and colleagues to carefully evaluate the efficacy of these latest techniques in biological repair of damaged cartilage and how they can benefit patients and knee surgeons. For more information please see the knee replacement surgery page.

FAQs about The Chelsea Knee Clinic

What can I expect from an initial consultation?

At the initial consultation we will chat about your symptoms, how they affect you and any medication you are taking. We will also look at any previous x-ray and MRI evidence. I will then carefully examine your knee. If further diagnostic imaging investigations are required these can be arranged as appropriate and sometimes be done on the same day. Once all the diagnostic tests are complete, we will discuss the diagnosis and the treatment options, and agree on a treatment plan.

What are your specialist areas of knee surgery?

I specialise solely in knee surgery and am known for joint replacement surgery as well as soft tissue knee reconstruction. I perform both partial and full surface replacements with leading numbers and outcomes on the National Joint Registry. I am passionate about the latest rapid recovery techniques following knee surgery with leading techniques to reduce post operative pain after knee procedures, which allow for a faster and smoother recovery. I am also interested in the new advances in stem cell technology and biological solutions for treating cartilage defects in the knee, but am careful about making sure that the right techniques are used for the appropriate treatable condition.

Where are you based?

My London practice is based at the Schoen Clinic where I am Head of Department - Knee Surgery. The Schoen Clinic is located in Wigmore Street, within the Harley Street medical area of London. I also have a practice in East Sussex at The Horder Centre, Crowborough, and The McIndoe Centre in East Grinstead, treating Private and NHS patients.

Do you work with athletes who need to recover very quickly?

I treat both professional and amateur athletes who have soft tissue knee injuries, and am one of the chosen surgeons for the Professional Football Association. I treat a number of different types of soft tissue injuries which are commonly experienced by athletes, for example I perform over 100 anterior cruciate ligament reconstructions every year as day case procedures. The vast majority of patients do not need surgery, and I am able to treat them in conjunction with colleagues who are expert physiotherapists and sports medicine consultants. If surgery is required, we try to achieve rapid recovery after surgical procedures.

What are your credentials as a knee surgeon?

I trained at Guy’s and St Thomas’ Hospital in London and qualified with a first-class degree in anatomy and an MBBS (Bachelor of Medicine - Bachelor of Surgery) degree in 1997. I undertook further training at centres of excellence, both in the UK and Australia, via the Royal College of Surgeons. In 2006 I was awarded the Walter Mercer Gold Medal for the best performance throughout Great Britain and Ireland in the final FRCS (Fellowship of the Royal College of Surgeons) orthopaedics examination. I was appointed British Orthopaedic Association Ambassador to Hong Kong in 2007 and worked in Australia in some of the best knee surgery units in the world. In 2008 I became a Consultant Surgeon in the UK and am an advisor to NHS England via the National Orthopaedic Alliance. I now perform amongst the highest number of knee replacement operations each year on the UK National Joint Registry with one of the lowest revision rates (meaning very high success rates) and am happy to share my surgical outcome data with my patients.

Do you undertake cartilage repair procedures?

Yes, I undertake various cartilage procedures such as meniscus tear repairs, removal of loose bodies in the knee and chondroplasty which stabilises and treats chondral lesions. These procedures are carried out using minimally invasive surgery called arthroscopy. Occasionally discrete cartilage surface defects require the latest biological techniques, and I am happy to treat each condition with the appropriate technique.

Can I be referred to you by my GP on the NHS?

You are allowed to ask your GP to refer you for specialist treatment on the NHS, but a referral is not automatic. You have the right to ask your GP for a NHS e-Referral appointment with me (NHS e-Referral replaced the Choose and Book system) as an NHS patient at the Horder Centre, Crowborough, or the McIndoe Hospital, East Grinstead (but not my practice at the Schoen Clinic, London). The referral often then comes with the funding required for me to treat you as an NHS patient. Even if you decide to see me privately, which you can do without a referral, it is still worthwhile getting a letter from your GP because he/she will be able to provide information about your medical history and details that I should be aware of. Nevertheless, this is not essential.