XNRL099
Replacement Tarsal, Right to New Technology Group 9 with Synthetic Substitute, Talar Prosthesis, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | X New Technology |
| Body System | N Bones |
| Operation | R Replacement |
| Body Part | L Tarsal, Right |
| Approach | 0 Open |
| Device | 9 Synthetic Substitute, Talar Prosthesis |
| Qualifier | 9 New Technology Group 9 |
Operation Definition
Putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part
Procedure Overview
This family covers procedures that remove damaged, diseased, or missing bone and replace it with a New Technology device or material - typically an implant with a novel design, surface coating, or material science advance that has earned its own tracking code separate from older replacement hardware. Surgeons turn to these devices when a segment of bone, most often in the spine, has collapsed, fractured beyond repair, or been resected because of tumor or severe infection, and a standard graft or off-the-shelf implant is not expected to integrate or hold up as well.
Patients encounter these procedures most often after vertebral body loss from cancer, trauma, or advanced degenerative collapse, where a surgeon inserts an engineered cage or structural implant to restore height and load-bearing capacity to the spine. The appeal of the newer materials is usually better bone ingrowth, reduced subsidence, or durability data that supporting agencies found strong enough to grant a distinct add-on payment category, which is why these cases get coded separately from conventional bone replacement.
Anatomy & Axis Detail
Tarsal, Right
The right tarsal bones, including the talus, calcaneus, navicular, cuboid, and cuneiforms, form the complex hindfoot and midfoot architecture that transmits body weight into the ground and links the leg to the foot through several tightly congruent joints. Replacement is considered when a tarsal bone is destroyed by avascular necrosis, severe trauma, tumor, or advanced arthritis to a degree that reconstruction alone cannot restore a stable, aligned joint. Because these bones have irregular, load-bearing articular surfaces, replacement in this location increasingly relies on custom or 3D-printed implants matched to the patient's specific anatomy rather than an off-the-shelf component. Coders should confirm laterality carefully and identify the exact tarsal bone involved, since the talus and calcaneus in particular carry very different biomechanical roles and surgical approaches.
Approach: Open
Open approach in New Technology denotes access to the target site through a surgical incision that exposes the body part directly to view and instrumentation. It stands apart from percutaneous and endoscopic approaches, which achieve access through small punctures or existing openings rather than a deliberate surgical opening of tissue.
Device / Substance / Technology: Synthetic Substitute, Talar Prosthesis
This device is a synthetic talus replacement used when the ankle bone itself is resected due to avascular necrosis, tumor, or severe trauma, rather than resurfacing the joint with a standard total ankle prosthesis. It differs from conventional ankle replacement components, which replace articular surfaces but leave the talar body largely intact. The custom talar shape restores hindfoot alignment and joint mechanics specific to that bone.
Qualifier: New Technology Group 9
Group 9 is the seventh-position qualifier used in the New Technology section to mark a device, substance, or technique as belonging to the 2022 annual cohort of new technology add-on codes. It has no clinical meaning of its own beyond that vintage tag, so coders rely on the specific table and body system to know what procedure it applies to. It is distinguished from Group 8 and Group 10 purely by the fiscal year the technology was approved for separate identification.
Coding & Documentation
A coder assigns from this family only when the operative note names the specific brand or technology and documentation ties it to the New Technology designation, since the device itself - not just the anatomic site - drives code selection. The surgeon's note should describe removal of the native bone segment and insertion of the qualifying implant, along with any manufacturer or trade name that maps to the approved technology group.
The most frequent error is defaulting to a standard Medical and Surgical section replacement code because the coder didn't recognize that the implant used qualifies for the New Technology section; the fix is checking the facility's current New Technology reference table against the device name in the operative report before finalizing. A second common slip is confusing this with Supplement, which is used when existing bone is reinforced rather than physically replaced.