Precision Joint Clinic · Insurance procedure guide
W4210: total knee replacement code
A practical explanation from Mr Mohamed Mussa, Consultant Hip and Knee Surgeon.
Search all procedure codes →What this code describes
W4210 is the primary total knee replacement entry in this guide. It should not be confused with a partial knee replacement or revision of an existing implant. Ask your treating team to confirm whether the planned operation is total, partial, complex or robotic-assisted before you seek authorisation.
Your clinical team must confirm the planned procedure. Your insurer must confirm authorisation for your surgeon, hospital and treatment.
Questions to ask before treatment
- Is the proposed operation total or partial knee replacement?
- Does the authorisation match the final surgical plan?
- Are the anaesthetist, hospital and rehabilitation covered separately?
Keep your authorisation reference and check any excess, shortfall or separate hospital, imaging and anaesthetic charges. If your treatment plan changes, ask whether authorisation needs updating.
Related codes
- W4200 — Complex primary knee replacement
- W5200 — Partial knee replacement
- W5830 — Robotic total knee replacement
Understanding your treatment
Read about the treatment and assessment →
Planning your care and recovery →
Consultations with Mr Mussa are available in Coventry and Worcester. Arrange an assessment or ask Harkeet about your proposed procedure code.
Source and checking date
AXA Health procedure schedule — checked 19 October 2026. The explanation here uses plain language; the insurer’s full description and rules take precedence. Other insurers may use different codes or requirements.