0QWMX4Z
Revision Tarsal, Left to No Qualifier with Internal Fixation Device, External Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | Q Lower Bones |
| Operation | W Revision |
| Body Part | M Tarsal, Left |
| Approach | X External |
| Device | 4 Internal Fixation Device |
| Qualifier | Z No Qualifier |
Operation Definition
Correcting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device
Procedure Overview
Revision procedures address a device that was previously implanted in a lower bone - such as a rod, plate, screw, or bone cement construct - when it has shifted position, is malfunctioning, or is otherwise not working as intended. The bone itself is not the primary target; the hardware or material within or against it is.
These procedures are common after orthopedic fixation surgery when follow-up imaging or symptoms reveal that a fixation device has loosened, backed out, broken, or migrated. Surgeons go back in to reposition, tighten, repair, or otherwise correct the existing device to the extent possible, aiming to avoid a full device replacement if the original hardware can still function once adjusted.
Anatomy & Axis Detail
Tarsal, Left
Revision procedures on the left tarsal bones address hardware complications following surgery on the hindfoot or midfoot cluster, such as the talus, calcaneus, or cuneiforms, most commonly after fracture fixation or arthrodesis. Given the tightly interlocking structure of the tarsals and their role in shock absorption and arch support, misplaced or prominent screws can restrict adjacent joint motion or irritate overlying tendons, warranting adjustment rather than complete hardware removal. This is distinct from a revision arthrodesis performed for nonunion, which involves different root operations. Because multiple tarsal bones may be instrumented in a single construct, the operative note must clearly identify which specific bone and device were revised to support accurate laterality and site-specific coding.
Approach: External
External approach applies to procedures performed directly on the skin or mucous membrane, or on an accessible body surface, without any instrumentation passing through a puncture or orifice. It covers things like manual reduction of a fracture or excision of a skin lesion. It differs from Via Natural or Artificial Opening in that no internal passage is entered at all, only the exposed surface.
Device: Internal Fixation Device
Internal fixation device is the general value for hardware such as plates, screws, or rods placed within the body to stabilize bone or joint, used when a more specific configuration is not indicated. It stands in contrast to the named subtypes - Rigid Plate, Intramedullary, Sustained Compression, and Intramedullary Limb Lengthening - which specify how the hardware achieves stabilization.
Coding & Documentation
The documentation needs to describe correction of a device already in place - repositioning a displaced screw, replacing a broken segment of a rod, or repairing a malfunctioning fixation component - rather than removal of the device followed by insertion of a brand-new one. If the surgeon fully swaps out the device rather than fixing the one already present, Removal plus Insertion or Replacement is usually the more accurate combination.
A frequent assignment mistake is coding Revision for a straightforward hardware removal with no correction performed, or for a first-time hardware placement. Coders should also verify the correct body part value reflects the bone where the device sits, since Revision codes are structured around device location rather than the device type itself.