Extensor mechanism reconstruction

Patient status post left total knee arthroplasty (TKA) presents with periprosthetic patellar fracture and extensor mechanism disruption. A midline incision was made which exposed the infrapatellar tendon, quadriceps, a loose patellar button and a fragmented patella, which was excised. Retinacular tissues were preserved for the reconstruction and quadriceps tendon was split into two segments. Drill holes were made into the tibia that was prepared with a bone graft and an allograft. The allograft was secured with tension wires and screws and additionally secured with sutures to the quadriceps tendon segments. The quadriceps was sewn over the graft. The retinacular tissue preserved earlier, was cut to the appropriate length and tensioned. The knee was put through range of motion (ROM) and the patella was appropriately placed as seen on intraoperative x-ray. The surgical wound was closed in layers.Is the quadriceps and/or patellar tendon repair included with the patellectomy? Is there a code for the repair of the extensor mechanism? Would CPT code 27350 alone or 27350 and 27599 be appropriately reported? ...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article focuses on operative management of extensor mechanism disruption following total knee arthroplasty, including reconstruction techniques involving the patella, quadriceps region, tendon structures, and graft-based support. It is intended for orthopedic coders, surgical coders, and reimbursement professionals who need to assess whether the case falls within broader knee reconstruction and post-arthroplasty repair guidance. The content addresses the clinical scenario, operative steps, and the coding-related question of how associated soft-tissue repair may relate to the primary procedure.

Why This Topic Matters

Cases involving post-arthroplasty extensor mechanism reconstruction can be difficult to interpret for coding because multiple structures and surgical steps may be involved in a single operative session. Understanding the scope of the procedure helps determine how to review the operative report and identify the relevant code set context.

What You Will Learn

  • The clinical setting for extensor mechanism reconstruction after knee arthroplasty
  • How the operative narrative describes patellar, quadriceps, and tendon-related surgical work
  • The general coding relevance of combined reconstructive and repair procedures in orthopedic surgery
  • What kinds of coding questions commonly arise from complex post-TKA knee reconstruction cases

Who Should Read This

  • Orthopedic coders
  • Surgical coders
  • Certified professional coders
  • Revenue cycle specialists
  • Orthopedic billers

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