031K0AK
Bypass Internal Carotid Artery, Right to Extracranial Artery, Left with Autologous Arterial Tissue, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 3 Upper Arteries |
| Operation | 1 Bypass |
| Body Part | K Internal Carotid Artery, Right |
| Approach | 0 Open |
| Device | A Autologous Arterial Tissue |
| Qualifier | K Extracranial Artery, Left |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Bypass procedures on the upper arteries reroute blood flow around a blocked or narrowed segment of an artery serving the head, neck, or upper extremities, using either a graft vessel or a rerouted native artery to reconnect blood supply beyond the obstruction. Common targets include the carotid, subclavian, axillary, and brachial arteries, where atherosclerotic disease can starve the brain, arm, or hand of adequate blood flow.
Surgeons perform these bypasses when angioplasty and stenting are unlikely to hold, when the blockage is too long or calcified for endovascular repair, or when a prior stent has failed. A graft, taken from the patient's own vein or a synthetic tube, is sewn in above and below the diseased segment so blood detours around it.
The goal is to protect against stroke, arm ischemia, or tissue loss by restoring adequate perfusion, and the operation is typically considered after imaging confirms the location and severity of the narrowing.
Anatomy & Axis Detail
Internal Carotid Artery, Right
The right internal carotid artery, which carries no branches in the neck and passes directly into the skull to supply the anterior cerebral circulation, is bypassed in select cases of severe stenosis unsuitable for endarterectomy, dissection, or after tumor involvement where the vessel must be reconstructed rather than sacrificed to preserve brain perfusion. Its course near the base of the skull and relation to cranial nerves IX through XII make distal exposure technically demanding and sometimes require a high cervical or skull base approach. Because this vessel directly perfuses the brain, cerebral protection strategies such as shunting or monitoring are standard during the reconstruction. The bypass graft's origin, whether from the common carotid or external carotid, together with the internal carotid as the distal recipient vessel, defines the specific body part coded for this procedure.
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.
Device: Autologous Arterial Tissue
Autologous Arterial Tissue refers to an artery segment taken from the patient's own body, such as the internal mammary or radial artery, and repositioned as a graft within the same patient, typically for coronary revascularization. Its arterial wall structure gives it different handling and durability characteristics than the venous counterpart, and it is chosen over synthetic or donor tissue to minimize immune rejection.
Qualifier: Extracranial Artery, Left
Identifies the left-sided extracranial artery - carotid or vertebral vessels before they cross into the skull - as the site of an intervention such as angioplasty or thrombectomy. It parallels the right-sided qualifier but applies only to left-side anatomy, and it excludes vessels once they become intracranial. Correct laterality coding here affects accuracy for procedures addressing carotid stenosis or dissection.
Coding & Documentation
Assigning a bypass code from this family requires documentation of both the proximal and distal anatomic sites the graft connects, since ICD-10-PCS bypass coding is built around a 'from-to' body part convention rather than a single location. The operative report must also specify graft material (autologous vein, synthetic, or other) because the device value changes accordingly. A recurring mistake is coding only the diseased artery without capturing the second, distal qualifier that defines where the bypass terminates; another is confusing a bypass with an endarterectomy, which clears the vessel rather than routing around it.