Sam Rajaratnam image


Sam Rajaratnam

FRCS (Tr. & Orth.)


Orthopaedic and trauma surgery
Knee surgery



Clinics at

Chelsea Outpatient Centre


020 3494 4010


As a consultant knee surgeon, Sam has three areas of Interest within knee surgery.

1. Knee replacement surgery

  • Sam is recognised throughout the UK as a leading knee specialist and performs the highest number of knee replacement operations (400) on the UK National Joint Registry each year, with excellent outcomes.
  • He is an expert on Rapid Recovery techniques around the knee and believes in a multidisciplinary team approach to achieving best results. 
  • Sam works with specialist Orthopaedic Anaesthetists, Physiotherapists and Surgical Assistants who are all highly experienced in their own right. 
  • He believes that ‘cumulative marginal gains’ in surgical, anaesthetics and rehabilitative technique leads to great improvement in surgical outcomes. 


2. Soft tissue reconstruction of the knee

  • Sam has great expertise in treating soft tissue injuries of the knee and treats a number of sportsmen and sportswomen regularly at his knee clinic in London. 
  • He works collaboratively with most high end physiotherapy and rehabilitation teams in London and the South East.
  • He is passionate about ‘day case’ knee ligament reconstructive procedures and has developed successful protocols for day case ACL, PCL and Patellofemoral ligament reconstructions over the years.


3. Cartilage repair and biological solutions

  • Sam is interested in cartilage repair procedures of the knee and is a member of the International Cartilage Repair Society (ICRS).
  • He believes 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, although newer techniques need to be judiciously employed to treat appropriate conditions. He believes that careful patient selection is the key to success.
  • He is currently working with consultant colleagues to set up a multi centre trial to perform and evaluate the latest techniques in this field and to make his knee clinic in London a key site for the delivery of these services.



  • Mr. Rajaratnam has been a Consultant Orthopaedic Surgeon specialising in knee surgery since 2008.
  • He trained at Guy’s and St Thomas’s Hospital in London where he qualified with a first class degree in anatomy and an MBBS in 1997. 
  • He then underwent basic surgical training at the Royal College of Surgeons, England and higher surgical training at numerous centres of excellence across the south east of England and in Sydney, Australia.
  • He was awarded the Walter Mercer Gold Medal for the best performance throughout Great Britain and Ireland in the final FRCS Orthopaedics and Trauma examination in 2006.
  • He acted as the British Orthopaedic Association Ambassador to Hong Kong in 2007 and then spent time working in Australia at some of the world’s best knee injury and reconstructive units.
  • He was appointed Consultant Orthopaedic Surgeon in 2008, and has now become one of the leading knee surgeons in the country with an excellent national reputation. He is on the advisory panel of the National Orthopaedic Alliance helping NHS England on developing knee surgery throughout the UK.

Special Interests

1. Knee replacement surgery
2. Soft tissue reconstruction of the knee
3. Cartilage repair and biological solutions



The Harley Street Clinic
London Bridge Hospital
The Portland Hospital
The Princess Grace Hospital
Wellington hospital
Harley Street at University College Hospital
Harley Street Queens
The Christie Clinic
Sarah Cannon Research UK
Blossoms Healthcare
Roodlane Medical
Galen Health Partners
52 Alderley Road
The London Gamma Knife Centre at St Bartholomew's
Make an Appointment