XNSC3GA
Reposition Lower Femur, Right to New Technology Group 10 with Ring External Fixation Device with Automated Strut Adjustment, Percutaneous Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | X New Technology |
| Body System | N Bones |
| Operation | S Reposition |
| Body Part | C Lower Femur, Right |
| Approach | 3 Percutaneous |
| Device | G Ring External Fixation Device with Automated Strut Adjustment |
| Qualifier | A New Technology Group 10 |
Operation Definition
Moving to its normal location, or other suitable location, all or a portion of a body part
Procedure Overview
Reposition procedures in this family move a bone that has shifted out of its correct alignment back to where it belongs, using a device technology advanced enough to warrant separate tracking from conventional realignment hardware. The best-known example is a magnetically controlled growing rod system used in children with progressive spinal deformity, where the rod can be lengthened gradually from outside the body without repeat open surgery.
This approach is chosen for young patients whose scoliosis or other spinal curvature is still worsening as they grow, since traditional rods would require frequent surgical lengthenings under anesthesia. Instead, an external magnet adjusts the implanted rod in a clinic visit, and the underlying procedure code captures the surgical placement and the correction of bone position that the device achieves over time.
Anatomy & Axis Detail
Lower Femur, Right
The right lower femur, the distal shaft and metaphyseal region just above the knee, is a common site for growth-related length discrepancies and post-traumatic malalignment because it contains one of the body's most active growth plates in skeletally immature patients. Repositioning here corrects angular or length abnormality without removing the bone, and a magnetically controlled intramedullary lengthening nail placed across this segment allows the surgeon to distract or angulate the distal femur gradually using an external magnetic controller, adjusting the correction as the knee and leg alignment are reassessed over time. Because the distal femur sits so close to the knee joint, precise correction here directly affects joint mechanics and gait. The distal location, right-sided laterality, and magnetic nail technology should all be clearly documented.
Approach: Percutaneous
In New Technology, Percutaneous describes entry into the body via needle or instrument puncture through the skin or a mucous membrane, without a surgical incision, mirroring the same concept in Medical and Surgical. It is distinguished from Open access, which requires a full incision, and from Percutaneous Endoscopic, which adds visualization through the puncture site.
Device / Substance / Technology: Ring External Fixation Device with Automated Strut Adjustment
This is a circular external fixation frame, similar in concept to a Taylor Spatial Frame, in which struts adjust automatically rather than requiring manual daily turning by the patient or clinician. It is used for gradual limb deformity correction or lengthening, and the automated adjustment mechanism is what separates it from standard ring external fixators that rely on manual strut calculations and turns performed by hand.
Qualifier: New Technology Group 10
New Technology Group 10 flags a procedure as part of the 2023 batch of add-on codes recognized under the New Technology section. The value itself carries no information about the device or drug involved; that comes from the table, body part, and approach values alongside it. Coders should not confuse it with Group 9 or Group 11, which cover the cohorts approved in the years immediately before and after.
Coding & Documentation
Coders should look for documentation identifying the specific device system by name, since the New Technology designation depends on which product was implanted, not just on the fact that a rod was placed. The note should also describe the bone segment being moved back into anatomic alignment, distinguishing the initial implantation encounter from later outpatient adjustment visits, which are typically not separately coded to this family.
A common error is coding every rod-lengthening visit as a new Reposition procedure; most adjustment sessions are noninvasive magnet-driven and fall outside inpatient procedural coding entirely. Another pitfall is missing the New Technology code altogether because the case was coded solely from the spinal fusion or instrumentation codes without recognizing the distinct device category.
Commonly Confused With
This family is frequently confused with standard Reposition procedures done with conventional growing rods or standard spinal instrumentation, where the difference is entirely the technology used, not the clinical intent. It also overlaps conceptually with Insertion procedures for monitoring devices, but Reposition specifically captures correction of the bone's position, while Insertion applies to appliances that assist or monitor without relocating the bone itself.