XRGM0B9
Fusion Tarsal Joint, Left to New Technology Group 9 with Internal Fixation Device, Open-truss Design, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | X New Technology |
| Body System | R Joints |
| Operation | G Fusion |
| Body Part | M Tarsal Joint, Left |
| Approach | 0 Open |
| Device | B Internal Fixation Device, Open-truss Design |
| Qualifier | 9 New Technology Group 9 |
Operation Definition
Joining together portions of an articular body part rendering the articular body part immobile
Procedure Overview
This family covers joint fusion procedures performed with a New Technology interbody or fixation device intended to permanently immobilize an articular joint, most commonly used in spinal surgery for degenerative disc disease, spondylolisthesis, or instability that has not responded to conservative care. The goal is the same as any fusion - eliminating painful motion between two bones by letting them grow together into one solid unit - but the device or biologic used to promote that fusion is advanced enough to be tracked separately from standard interbody cages.
Patients typically undergo this procedure after persistent back or neck pain traced to an unstable segment, when imaging shows the joint moving abnormally or pressing on nearby nerves. The newer implant materials or surface treatments are chosen because trial data showed faster, more reliable bone bridging than earlier-generation hardware.
Anatomy & Axis Detail
Tarsal Joint, Left
The left tarsal joints include the subtalar, talonavicular, calcaneocuboid, and related intertarsal articulations that stabilize the midfoot and hindfoot and accommodate terrain during ambulation. When degenerative arthritis, collapsed arches, or post-traumatic deformity affecting this side become disabling, fusing the involved tarsal joint or joints eliminates painful motion and restores a rigid, correctly aligned foot for weight bearing. Given the proximity of multiple small joints, surgeons and coders must identify precisely which articulation is addressed, since the biomechanical consequences and hardware trajectories differ between, for example, subtalar and talonavicular fusion. The new technology code is applied only when the fusion involves a specific implant or technique that represents a documented technological advance over standard left tarsal fusion procedures already classified elsewhere.
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: Internal Fixation Device, Open-truss Design
This internal fixation device features an open-truss structural design, an engineered lattice of interconnecting struts intended to reduce implant mass while maintaining mechanical strength and allowing bone tissue ingrowth through the open spaces. It differs from solid-plate fixation devices, which lack any porous or ingrowth pathway, and from gyroid-lattice designs, which use a distinct curved, repeating geometric pattern rather than a truss framework.
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 needs the operative report to name the specific fusion device or technology and confirm that the joint surfaces were prepared and immobilized as part of the same procedure. Supporting documentation should identify the specific spinal level or joint fused and any bone graft or biologic used alongside the device.
The recurring error is applying a standard Medical and Surgical Fusion code when the device actually qualifies for New Technology tracking, which understates the technology used and can affect reimbursement. Coders should also avoid double-counting fusion at levels where only decompression, not fusion, was performed in the same session.
Commonly Confused With
This is easily confused with standard-section Fusion procedures using conventional cages, where the deciding factor is strictly which device was implanted. It also gets mixed up with Insertion procedures for New Technology joint devices, but Fusion requires that the joint be rendered immobile, while Insertion covers appliances placed to monitor or assist function without eliminating joint motion.