
Mr Ashwin Unnithan
Professional statement
Mr Ashwin Unnithan is a highly respected consultant orthopaedic surgeon in Chertsey, south London, Walton-on-Thames and Woking, who specialises in knee replacement, hip replacement and revision hip replacement, alongside revision knee replacement, sports injuries, robotic half knee replacement, robotic knee replacement and robotic hip replacement. He privately practises at The Runnymede Hospital, Nuffield Health Parkside Hospital, New Victoria Hospital and Nuffield Health Woking Hospital, while his NHS base is Ashford and St Peter's Hospitals NHS Foundation Trust.
After completing his undergraduate studies, Mr Unnithan pursued his basic surgical training in Surrey and Sussex, followed by a Master’s degree in Musculoskeletal Science at University College London and the Royal National Orthopaedic Hospital. He further honed his skills with advanced surgical training on the south-west London rotation, which included a trauma fellowship in New Zealand and prestigious fellowships at the Bristol Hip Unit and the Royal National Orthopaedic Hospital.
Mr Unnithan has contributed significantly to the field of orthopaedics through numerous publications in peer-reviewed journals and presentations at international conferences across Europe and the United States. His work has been recognised with several awards, including best scientific presentation in 2014 at the British Trauma Society meeting and Best Podium Presentation at the British Hip Society Meeting, 2024.
Mr Unnithan is a member of various professional organisations including the Royal College of Surgeons (MRCS), the British Orthopaedic Association and the American Academy of Orthopaedic Surgeons. Furthermore, he has been recognised with a Clinical Excellence Award, based on patient feedback to iWantGreatCare.
Clinics

The Runnymede Hospital - part of Circle Health Group
Chertsey, Guildford Street, Ottershaw, Lyne, Chertsey KT16 0RQ,Medical insurances accepted
Credentials
Professional experience
- 24 years of experience
- Consultant orthopaedic surgeon, The Runnymede Hospital
Subspecialties
- Robotic half knee replacement
- Robotic knee replacement
Professional memberships
- MRCS, Royal College of Surgeons
- British Orthopaedic Association
Education
- Bachelor of Medicine, Bachelor of Surgery (MBBS)
- Master in Musculoskeletal Science (MSc), University College London and the Royal National Orthopaedic Hospital
Prizes and awards
- Clinical Excellence Award, iWantGreatCare
Languages spoken
- English
Reviews
- Would you recommend this doctor?
- Treatment of the doctor
- Treatment of the staff
- Waiting time
- Condition of facilities
- The whole experience was carried out in a friendly and professional manner
- I had a TKR with Dr Unnithan and he was very professional. The bedside manner was also very friendly and professional. I’ve made a good recovery and this is thanks to the doctor and wider support team. Thank you.
- Dear Dr Unnithan. We sincerely thank you for the care and professionalism shown during my mum’s recent surgery. From the pre-operative consultations through the surgery and recovery process, we felt well informed, supported, and confident in the treatment she received.We truly appreciate the time you took to clearly explain the procedure, patiently answer our questions, and ensure my mum’s comfort throughout.The nursing and support staff were consistently kind and attentive Extremely grateful!
- Mr Unnithan gave me clear explanations of the extent of my injury, and the options for treatment. He was courteous but firm in his assessments, and gave me confidence that I would be in good hands. He has led me to be patient in my recovery, and the treatment appears to have been successful and my recovery is on track. I found all of the staff at Parkside to be friendly and compassionate. I would be happy to recommend both Mr Unnithan and Parkside Hospital to others with similar knee problems.
- I am very grateful to Mr Unnithan and his team at Parkside. My journey from consultation to surgery to discharge was absolutely flawless. Mr Unnithan is friendly, honest and explains what is wrong (and what he is going to do about it!) extremely well. Best of all, six weeks post-op and the pain in my right hip has gone. Wishing all at Parkside a happy, healthy 2026.
- Mr Unnithan was genuine and thorough throughout the entire process. I was very nervous but Mr Unnithan alleviated all my nerves through his clear explanation and expectations, which my wife, son and I were thrilled with. Thank you!
- I recently had knee surgery with Mr. Ashwin Unnithan at Nuffield Health Parkside Hospital in Wimbledon, and I couldn't be more impressed. The entire experience, from pre-op to post-op, was handled with exceptional care and professionalism. Mr. Unnithan.