05L63ZZ
Occlusion Subclavian Vein, Left to No Qualifier with No Device, Percutaneous Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 5 Upper Veins |
| Operation | L Occlusion |
| Body Part | 6 Subclavian Vein, Left |
| Approach | 3 Percutaneous |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Completely closing an orifice or the lumen of a tubular body part
Procedure Overview
Occlusion procedures close off an upper vein completely, cutting off blood flow through that vessel using ligation, clipping, embolization coils, or injected sclerosing agents. This family includes treatments for problematic veins in the arms, neck, and chest, such as closing an abnormal or diseased superficial vein, sealing off a vein feeding a vascular malformation, or ligating a vessel to control bleeding.
Physicians choose occlusion when a vein is causing symptoms on its own - varicosities, an arteriovenous malformation, or persistent bleeding - and the safest solution is to stop blood from flowing through it entirely rather than removing the tissue or repairing its structure. Endovascular techniques using catheter-delivered coils or glue have become common alternatives to open surgical ligation for many of these cases.
Because the vein remains in the body afterward, simply rendered nonfunctional, patients should understand this differs from having tissue excised; the vessel is sealed shut and left in place.
Anatomy & Axis Detail
Subclavian Vein, Left
The left subclavian vein runs beneath the clavicle, continuing from the axillary vein and merging with the left internal jugular vein to form the left innominate vein, with the thoracic duct entering near its junction with the internal jugular. Occlusion of this vessel is a deliberate, higher-stakes intervention compared with routine catheter placement, generally reserved for controlling hemorrhage, addressing a vascular malformation, or managing a vein badly scarred or damaged by prior instrumentation. Its proximity to the subclavian artery, brachial plexus, and lung apex requires a careful surgical or endovascular approach to avoid injury to these structures. Since the vessel drains the left arm, disrupting flow through it can lead to venous hypertension and swelling in the limb if collateral pathways are insufficient.
Approach: Percutaneous
Percutaneous describes entry by needle or instrument puncture through the skin or mucous membrane to reach the site of the procedure, without cutting the tissue open or using a visualizing scope. It differs from Open in that the site itself is never exposed, and from Percutaneous Endoscopic in that no endoscope is used to see internal structures. Common examples include needle biopsies and injections.
Coding & Documentation
Coders need documentation specifying the exact upper vein occluded and the technique used, since the approach value changes based on whether the procedure was open, percutaneous, or percutaneous endoscopic. Notes describing coil embolization, sclerotherapy injection, ligation with suture, or clip application all support an Occlusion code, but the device or substance used should be clearly recorded to determine whether a device value applies.
A common error is confusing Occlusion with Restriction, which narrows a vessel's diameter rather than closing it completely - sclerotherapy notes in particular need careful reading, since some techniques narrow rather than fully close the lumen. Coders also sometimes miss that multiple veins occluded in the same operative session, such as several tributaries during varicose vein treatment, may each need separate body part values if the veins are distinct enough to warrant it under the applicable body part table.