W4231: Robotic assisted revision of total knee replacement - unilateral
For guidance only. Always check the code and obtain authorisation from your insurer before treatment. Other insurers may use different codes and coding rules.
Also known as
For guidance only. Procedure codes and descriptions on this site are provided for general guidance only and are not a guarantee of insurance cover or payment. Always check the correct code with your surgeon's secretary and obtain authorisation from your insurer before treatment. Insurers shown are examples only. Other insurers are available, and each may use the same, similar or different codes and coding rules.
Insurer listing
| Insurer | Status | Notes |
|---|---|---|
| Bupa | Listed | Listed by Bupa |
| AXA Health | Not listed | Not on the AXA Health procedure list |
| Vitality | Check cover | Listed by Vitality: check cover at pre-authorisation |
| WPA | Check cover | Listed by WPA: check cover at pre-authorisation |
Codes that can't be billed with W4231
Neither code can be billed with the other
- W5830: Robotic assisted total knee replacement – unilateral +/- cement, +/- patella
- W8500: Multiple arthroscopic operations on knee (including meniscectomy, chondroplasty, drilling or microfracture) - unilateral
- W5200: Unicompartmental knee replacement - unilateral
- W4210: Total prosthetic replacement of knee joint +/- cement +/- patella resurfacing - unilateral
- W9020: Dynamic arthrogram of joint
- W5822: Robotic assisted revision of unicompartmental knee replacement - unilateral
- W5821: Robotic assisted unicompartmental knee replacement - bilateral
W4231 can't be billed with
- W0630: Patellectomy
- W3100: Bone graft (as sole procedure)
- W4200: Complex primary total knee replacement (i.e. including bone graft, augmentation or osteotomy)
- W4214: Customised unicompartmental knee replacement
- W4216: Customised bicompartmental knee replacement
- W4218: Customised total prosthetic replacement of knee joint
- W4244: Tibial liner exchange in total knee replacement
- W4280: Total prosthetic replacement of knee joint +/- cement +/- patella resurfacing - bilateral
- W5210: Revision of unicompartmental knee replacement - unilateral
- W5300: Bicompartmental knee resurfacing
- W5800: Conversion of a unicompartmental knee replacement to a total replacement of knee joint
- W5831: Robotic assisted total knee replacement - bilateral +/- cement, +/- patella
- W5851: Localised patient specific knee resurfacing arthroplasty - unilateral
- W5852: Localised patient specific twin knee resurfacing arthroplasty - unilateral
- W8580: Multiple arthroscopic operations on knee (including meniscectomy, chondroplasty, drilling or microfracture) - bilateral
- W8700: Diagnostic arthroscopic examination of joint, +/- biopsy (not otherwise specified) (as sole procedure)
- W9040: Injection(s) +/- aspiration, into joint, cyst, bursa - unilateral
- W5201: Unicompartmental Knee Replacement - bilateral
Related codes
- W5822: Robotic assisted revision of unicompartmental knee replacement - unilateral
- W4230: Revision of total knee replacement – unilateral
- W5831: Robotic assisted total knee replacement - bilateral +/- cement, +/- patella
- W5830: Robotic assisted total knee replacement – unilateral +/- cement, +/- patella
- W5821: Robotic assisted unicompartmental knee replacement - bilateral
- W5820: Robotic assisted unicompartmental knee replacement - unilateral
Frequently asked questions
What is the procedure code for robotic assisted revision of total knee replacement - unilateral?
The procedure code is W4231: Robotic assisted revision of total knee replacement - unilateral.
Which insurers list W4231?
W4231 is listed by Bupa. Vitality and WPA list it, but you should check cover before treatment. It is not on the AXA Health procedure list. Always confirm the code and cover with your insurer.
Can W4231 be billed with other procedures?
The coding rules say W4231 cannot be billed together with 25 other codes, including W5830 (Robotic assisted total knee replacement – unilateral +/- cement, +/- patella), W8500 (Multiple arthroscopic operations on knee (including meniscectomy, chondroplasty, drilling or microfracture) - unilateral), W5200 (Unicompartmental knee replacement - unilateral). See the full list above.
About the surgeon
Mr Jakub Kozdryk, Consultant Orthopaedic Surgeon, performs hip and knee replacement and revision surgery at Nuffield Health Warwickshire and Circle Meriden Hospital.
Revision knee replacement with Mr Kozdryk →Book an appointment with Mr Kozdryk →
For guidance only. Procedure codes and descriptions on this site are provided for general guidance only and are not a guarantee of insurance cover or payment. Always check the correct code with your surgeon's secretary and obtain authorisation from your insurer before treatment. Insurers shown are examples only. Other insurers are available, and each may use the same, similar or different codes and coding rules.
Codes and descriptions are for guidance only. Insurer listing and cover information is taken from each insurer's published schedule and is for guidance only: always confirm the code and cover with the insurer before treatment. This site is not affiliated with CCSD or any insurer. No fees are shown.
Last checked: 2026-10-01