04RS47Z
Replacement Posterior Tibial Artery, Left to No Qualifier with Autologous Tissue Substitute, Percutaneous Endoscopic Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 4 Lower Arteries |
| Operation | R Replacement |
| Body Part | S Posterior Tibial Artery, Left |
| Approach | 4 Percutaneous Endoscopic |
| Device | 7 Autologous Tissue Substitute |
| Qualifier | Z No Qualifier |
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
Replacement procedures in the lower arteries involve taking out a diseased or damaged arterial segment and putting in synthetic graft material or biological tissue to physically stand in for that piece of vessel. This is distinct from simply patching or reinforcing an artery, since the native segment is functionally substituted rather than preserved and bolstered.
A classic example is an aortobifemoral or femoral-popliteal graft placed after removing a severely diseased, occluded, or aneurysmal segment of artery, using a synthetic conduit such as Dacron or PTFE, or in some cases a harvested vein used as a full segmental replacement. Patients typically arrive at this procedure after conservative management or angioplasty has failed, or when an aneurysm poses a rupture risk that mandates excising the weakened wall.
Anatomy & Axis Detail
Posterior Tibial Artery, Left
The left posterior tibial artery mirrors its right-sided counterpart, descending through the deep posterior calf to supply the heel and plantar foot, and is a frequent target of reconstruction in advanced peripheral arterial disease or diabetic vasculopathy affecting distal runoff. Replacement becomes necessary when a segment of the vessel is occluded, aneurysmal, or too damaged for endarterectomy or simple repair to restore adequate flow to a threatened limb. Given the small diameter and the vessel's course alongside the tibial nerve, an autogenous vein graft is generally preferred over prosthetic conduit to maintain long-term patency in this low-pressure system. The graft is anastomosed to bridge the diseased segment, restoring a continuous channel toward the foot. As with other small distal arteries, documentation should specify whether the replacement material is autologous tissue or a substitute, since this determines the device value selected for the procedure.
Approach: Percutaneous Endoscopic
Percutaneous Endoscopic combines a puncture through skin or mucous membrane with insertion of an endoscope to visualize the procedure internally, as in laparoscopic cholecystectomy. It is distinguished from plain Percutaneous by the presence of scope-guided visualization, and from Via Natural or Artificial Opening Endoscopic by its route being a new puncture rather than an existing orifice or stoma.
Device: Autologous Tissue Substitute
Autologous Tissue Substitute identifies a device value where material harvested from the patient's own body, such as an autograft, is used to replace or reconstruct a body part. Its defining feature is tissue origin from the patient, setting it apart from Nonautologous Tissue Substitute, sourced from a donor or animal, and Synthetic Substitute, made of manufactured material.
Coding & Documentation
The operative report must clearly establish that a segment of native artery was excised or its function replaced, and that a graft or biological material took its place, distinguishing this from Bypass, where the diseased segment is left in place and a new route is constructed around it. Coders should identify the specific arterial body part value replaced and the device value representing the graft material, whether autologous, nonautologous, or synthetic.
A common error is coding a bypass graft as a Replacement when the original artery segment was left intact and simply routed around; another is failing to capture the correct device value when a combination of graft materials was used in a single reconstruction.