The reason that a PATIENT requires Revision Knee Replacement Surgery.
National Codes:
| Aseptic Loosening | |
| 1a | Femur | 
| 1b | Tibia | 
| 1c | Patella | 
| 02 | Infection | 
| 03 | Dislocation/ Subluxation | 
| Lysis | |
| 4a | Femur | 
| 4b | Tibia | 
| 05 | Instability | 
| 06 | Wear of Polyethelene Component | 
| 07 | Component Dissociation | 
| 08 | Unexplained Pain | 
| 09 | Malalignment | 
| 10 | Periprosthetic Fracture | 
| 11 | Implant Fracture | 
| 12 | Stiffness | 
| 13 | Other | 
This attribute is also known by these names:
| Context | Alias | 
|---|---|
| formerly | JOINT REPLACEMENT REVISION REASON CODE | 
| plural | JOINT REPLACEMENT REVISION REASON CODES FOR KNEE |