07LB4CZ
Occlusion Lymphatic, Mesenteric to No Qualifier with Extraluminal Device, Percutaneous Endoscopic Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 7 Lymphatic and Hemic Systems |
| Operation | L Occlusion |
| Body Part | B Lymphatic, Mesenteric |
| Approach | 4 Percutaneous Endoscopic |
| Device | C Extraluminal 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 a lymphatic vessel or duct so that fluid can no longer pass through it, most notably ligation of the thoracic duct to control a chylous leak or chylothorax where lymphatic fluid is escaping into the chest. A surgeon ties off, clips, or otherwise seals the vessel, either through an open approach or thoracoscopically, redirecting or stopping the flow of lymph at that point.
This is a targeted response to a specific mechanical problem, a duct that's leaking or that needs to be interrupted, rather than a treatment aimed at disease within the node or organ itself. It's used when conservative measures like dietary changes or drainage haven't resolved persistent lymphatic leakage, often following thoracic or cardiac surgery, trauma, or in association with certain tumors.
Because the vessel is completely closed rather than partially narrowed or removed, the tissue beyond the occlusion loses its normal drainage pathway, which is why the procedure is typically reserved for cases where an alternate route for lymph flow exists or the leak itself poses the greater risk.
Anatomy & Axis Detail
Lymphatic, Mesenteric
The mesenteric lymphatic network drains the small and large intestine, carrying both immune cells and absorbed dietary fats as chyle toward the cisterna chyli. These vessels and nodes are occluded most commonly to manage chylous ascites, a mesenteric lymphatic leak following bowel resection or retroperitoneal surgery, or as part of oncologic procedures where lymphatic spread from a gastrointestinal malignancy needs to be interrupted. Because the mesentery is a thin, mobile, richly vascular structure folding between loops of bowel, the involved lymphatic vessel must be traced carefully to avoid compromising the mesenteric blood supply to adjacent intestine. Confirmation of a milky or lipid-rich fluid at the site can help localize the leaking channel before it is ligated, clipped, or otherwise closed off.
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: Extraluminal Device
Extraluminal Device describes a device positioned on the outside surface of a tubular or hollow body part rather than within its lumen, such as a vascular banding or external stabilization device. It is the structural counterpart to Intraluminal Device, distinguished by its external placement relative to the vessel or duct wall rather than sitting inside the passageway itself.
Coding & Documentation
The note should specify the duct or lymphatic vessel occluded, most commonly the thoracic duct, and the technique used - ligation, clipping, or another method that completely closes the lumen - along with the clinical reason, typically a documented chylothorax or chyle leak. Confirming that the vessel is fully closed, not just narrowed or partially interrupted, supports Occlusion over another root operation.
Coders sometimes misassign a percutaneous lymphatic embolization procedure to the wrong root operation by not distinguishing embolic material placed to occlude the duct from a device left for another purpose, or by missing that thoracic duct ligation performed incidentally during a larger thoracic operation still needs its own separate code.
Commonly Confused With
Restriction is the operation most likely to be confused with Occlusion, since both narrow or block a passage, but Restriction only partially narrows the lumen while Occlusion closes it completely - a detail that has to come directly from the operative description of what was accomplished. Ligation for hemostasis during an unrelated procedure, where a small lymphatic is tied off incidentally to control oozing, generally isn't coded separately from the primary procedure, unlike a deliberate therapeutic duct ligation performed to treat a leak.