The reason that a PATIENT requires Revision Knee Replacement Surgery.
National Codes:
| Aseptic Loosening | |
| 1 | Femur Aseptic Loosening | 
| 2 | Tibia Aseptic Loosening | 
| 16 | Patella | 
| 3 | Infection | 
| 4 | Dislocation/ Subluxation | 
| Lysis | |
| 5 | Femur Lysis | 
| 6 | Tibia Lysis | 
| 7 | Instability | 
| 8 | Wear of Polyethelene Component | 
| 9 | Component Dissociation | 
| 10 | Unexplained Pain | 
| 11 | Malalignment | 
| 12 | Peri-prosthetic Fracture | 
| 13 | Implant Fracture | 
| 14 | Stiffness | 
| 18 | Progressive Arthritis Remaining Knee | 
| 17 | Other (not listed) | 
Note: The National Codes have been listed in logical sequence rather than alphanumeric order.
This attribute is also known by these names:
| Context | Alias | 
|---|---|
| formerly | JOINT REPLACEMENT REVISION REASON CODE | 
| plural | JOINT REPLACEMENT REVISION REASON CODES FOR KNEE |