Private Arthrosamid knee injection cost in the UK: 2026 price guide

A private Arthrosamid injection places a polyacrylamide hydrogel into the knee joint to ease osteoarthritis pain, offered as a longer-lasting alternative to steroid or hyaluronic acid injections for some people.

The range in the published self-pay lists for Arthrosamid knee injection was £2,995 to £5,865. That spread reflects different hospitals, different variants and different ideas of what belongs in a package, so the table names each one.

Lists are revised from time to time and sit alongside conditions in the small print. The figures help you see where a quote falls, but they cannot replace your own estimate.

The skin is numbed and the gel is injected into the knee joint under imaging guidance, after which you are observed briefly. It is a one-off injection rather than a course.

Because it is a newer treatment, ask what follow-up data exist and what happens if you later need a knee replacement.

First-line care for knee osteoarthritis is exercise, weight loss where relevant and pain relief, followed by steroid injection for short-term relief and, for advanced disease, joint replacement. Newer injectables such as polyacrylamide gel sit between injections and surgery.

Evidence for the gel comes from smaller studies with shorter follow-up than for joint replacement. Understanding what it may and may not achieve helps you compare it with other options that cost less or last longer.

Two patients having the same operation or test can receive quite different bills. For Arthrosamid knee injection, these are the factors that most often explain the gap.

• Product cost: the gel itself is a significant part of the price.

• One knee or both: Nuffield Edinburgh lists a single knee at £2,995 and both knees at £5,865.

• Guidance: ultrasound or fluoroscopy used for placement.

• Consultation and imaging: X-ray or MRI beforehand.

• Setting: a procedure room with sterile technique.

Ask for the inclusions in writing. For this procedure the usual split between what is covered and what is charged on top looks like this.

Insurers generally do not cover this injection because long-term evidence is limited, so most people self-pay.

Check whether your insurer recognises the exact procedure and the consultant you plan to see, and ask for any excess in writing. Self-funders can usually ask about finance, but terms depend on credit checks and should be read closely.

The NHS does not routinely offer this treatment; options include exercise, weight management, painkillers, steroid injection and surgery.

Many people consider private care because of NHS waiting times, but the NHS route costs nothing at the point of use and the 18-week standard applies to non-urgent consultant-led pathways. Local performance varies.

You rest briefly and avoid strenuous activity for a period, with benefit expected over weeks.

The risks below are the ones that can turn a quoted price into a larger bill, so ask how each would be dealt with.

• Long-term outcomes are still being studied and effects vary, so you may pay for a treatment that does not help; discuss evidence in your case.

• Infection, swelling and pain after injection occur occasionally.

Write the answers down as you go. These are the questions that tend to separate similar-looking quotes for this procedure.

• What evidence supports this product for my knee?

• Is the price for one or both knees?

• Does it affect future knee replacement?

• What is the follow-up plan?

• Is every fee in the quote guaranteed, or could consultant and anaesthetist charges differ from the estimate on the day?