05C00ZZ
Extirpation Azygos Vein to No Qualifier with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 5 Upper Veins |
| Operation | C Extirpation |
| Body Part | 0 Azygos Vein |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Taking or cutting out solid matter from a body part
Procedure Overview
Extirpation procedures on the upper veins remove solid matter, such as an organized blood clot, plaque, or foreign material, from inside a vein while leaving the vein itself intact. This is performed when a clot has formed within the vessel, causing pain, swelling, or risk of the clot traveling elsewhere in the body, and the physician needs to clear the vessel lumen rather than remove any of the vein wall.
The procedure can be done through an open incision or percutaneously with a catheter-based device that grabs or suctions the clot out through a small puncture. Because it targets solid material specifically, it is distinct from simply draining fluid, and the goal is to restore normal blood flow through a vein that would otherwise remain obstructed.
Anatomy & Axis Detail
Azygos Vein
The azygos vein arches over the right main bronchus to join the superior vena cava and serves as a key collateral pathway draining the posterior thoracic and abdominal walls, becoming clinically important when the inferior vena cava is obstructed or absent. Extirpation of this vein involves taking out solid matter such as a thrombus, embolus, or organized clot from within its lumen, typically performed when azygos thrombosis threatens this collateral drainage route or contributes to symptomatic venous congestion. Because the vein sits deep within the posterior mediastinum near the esophagus, thoracic duct, and vertebral bodies, procedures here are technically demanding, and the documentation should confirm that abnormal material was physically removed from the vessel rather than the vein being ligated, resected, or bypassed.
Approach: Open
Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.
Coding & Documentation
Documentation should clearly describe the material removed as solid, such as thrombus, and specify the approach used, open or percutaneous, since that determines the approach character. The named upper vein involved must be identified precisely, as the body part options are vein-specific rather than grouped by limb.
A recurring coding error is applying extirpation when the physician instead broke up the clot in place without removing it, which belongs to fragmentation rather than extirpation. Another common issue is coding a mechanical thrombectomy that also involved placement of a stent or angioplasty as extirpation alone, when the additional intervention requires its own separate code.