Guide
Partial vs total knee replacement: the published price gap
Updated
Not every worn knee needs the whole joint replaced, and one UK hospital publishes a price for each variation, which makes the gaps readable rather than guessed at.
What the NHS says the difference is
The NHS describes a total knee replacement as replacing the lower end of your thigh bone and the upper end of your shin bone with metal and plastic parts, with the kneecap moved aside during the operation and sometimes replaced at the back. A partial replacement, it says, is used when you have arthritis in one half of your knee, so only the bones on the affected side are replaced. The NHS adds that a partial replacement uses a smaller cut and that you should have a quicker recovery (nhs.uk).
The published price gap
| Type as published | Guide price |
|---|---|
| Unicompartmental (partial) knee replacement | From £13,275 |
| Robot-assisted (ROSA) partial knee replacement | From £14,015 |
| Standard total knee replacement | From £14,781 |
| Signature knee replacement | From £15,881 |
| Robot-assisted (ROSA) total knee replacement | From £17,560 |
From Benenden Hospital's self-pay prices, read 15 August 2026, where each figure is stated to include an X-ray of the relevant body part excluding MRI, the surgery, a private en-suite room and a follow-up consultation. Practice Plus Group publishes a single knee replacement figure of £13,799 without splitting partial from total, so the two lists are not directly comparable line for line.
The gap is about £4,300, and it is not yours to choose
Between the cheapest and dearest rows above sits roughly £4,285 of published difference. That is a real spread, but it describes different operations for different knees. Whether one compartment or the whole joint needs replacing is decided on your imaging and your examination by an orthopaedic surgeon, and a partial replacement is not simply a budget version of a total one.
Sensible questions about technique
- Ask which type the quote assumes, and what the price would be for the alternatives that hospital offers.
- Ask what the surgeon expects to find, and what happens to the price if a partial replacement turns out not to be feasible once surgery starts.
- Ask what robotic assistance is expected to change for you specifically, given it is published at a premium.
- Ask whether your operation will be recorded with the National Joint Registry, which the NHS says collects details of knee replacements to help improve patient safety, experience and outcomes.
We take no position on which technique or implant is better. That question belongs to a consultant orthopaedic surgeon who has seen your imaging, and the published price gap is not evidence either way.