05B04ZZ
Excision Azygos Vein to No Qualifier with No Device, Percutaneous Endoscopic Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 5 Upper Veins |
| Operation | B Excision |
| Body Part | 0 Azygos Vein |
| Approach | 4 Percutaneous Endoscopic |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Cutting out or off, without replacement, a portion of a body part
Procedure Overview
Excision procedures in the upper veins involve cutting out a portion of a diseased or damaged vein without replacing it, most commonly to remove a segment affected by phlebitis, a varicosity, a tumor, or a section of vessel that has been injured. Because these are superficial or accessible veins in the arm, chest, or neck, excision is frequently done to relieve pain, improve appearance, or eliminate a source of clotting or infection rather than to restore blood flow, since the upper extremity has extensive collateral venous drainage.
A surgeon typically makes a small incision over the affected vein, isolates the segment, and removes it while leaving the surrounding tissue intact. Excised tissue may also be sent for biopsy when the reason for removal is to evaluate a suspicious growth or mass involving the vein wall.
Anatomy & Axis Detail
Azygos Vein
The azygos vein ascends along the right side of the vertebral column within the posterior mediastinum, collecting blood from the posterior intercostal veins and providing an important collateral pathway between the superior and inferior vena cava systems before arching over the right main bronchus to join the superior vena cava. Its deep thoracic location means excision is uncommon and generally undertaken for a tumor, aneurysm, or vascular malformation directly involving the vessel, or when it must be sacrificed during extensive mediastinal or esophageal resections. Because the azygos serves as a major collateral route in conditions such as inferior vena cava obstruction, its removal is planned carefully to confirm that alternative venous drainage pathways are adequate to prevent postoperative congestion.
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.
Coding & Documentation
Coders need documentation confirming that only a portion of the vein was removed, since removal of an entire named vein still falls under excision as long as it is not paired with a graft or synthetic replacement. The operative report should specify the exact vein segment taken and whether the tissue was sent to pathology, which supports the diagnostic qualifier when applicable.
A common mistake is defaulting to excision when the physician actually performed a resection that included reconstruction or bypass, which would instead be coded as a different root operation. Coders should also watch for procedures described as "stripping" a vein, which despite the informal terminology is typically coded to extraction rather than excision because force is used to pull the vessel out along its length.