037404Z
Dilation Subclavian Artery, Left to No Qualifier with Intraluminal Device, Drug-eluting, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 3 Upper Arteries |
| Operation | 7 Dilation |
| Body Part | 4 Subclavian Artery, Left |
| Approach | 0 Open |
| Device | 4 Intraluminal Device, Drug-eluting |
| Qualifier | Z No Qualifier |
Operation Definition
Expanding an orifice or the lumen of a tubular body part
Procedure Overview
Dilation procedures widen a narrowed or blocked segment of an upper artery, most often through balloon angioplasty with or without stent placement, to restore adequate blood flow to the brain, neck, or arm. Arteries like the carotid, subclavian, and brachial commonly develop narrowing from atherosclerotic plaque, and dilation is one of the least invasive ways to correct it.
A catheter carrying a balloon, and often a stent, is threaded to the narrowed site under imaging guidance; the balloon is inflated to compress the plaque against the vessel wall, and a stent may be left in place to hold the artery open afterward. This is typically attempted before a bypass is considered, since it avoids open surgery and graft material.
Patients undergo this procedure to reduce stroke risk, relieve arm claudication or ischemia, and avoid a more invasive vascular reconstruction, with the artery's own wall preserved rather than replaced or rerouted.
Anatomy & Axis Detail
Subclavian Artery, Left
The left subclavian artery originates directly from the aortic arch rather than from a brachiocephalic trunk, giving it a slightly different catheter approach than its right-sided counterpart, and it likewise supplies the left arm while giving rise to the left vertebral artery. Stenosis or occlusion can produce arm claudication or subclavian steal syndrome, where retrograde vertebral flow diverts blood from the brainstem circulation during arm exertion. Dilation addresses these narrowings, frequently with stent support given the artery's proximity to the aortic arch and its exposure to high flow turbulence. This vessel is also relevant in patients who have had prior aortic arch surgery or thoracic endovascular aneurysm repair, where deliberate coverage or preservation of its origin factors into procedural planning.
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: Intraluminal Device, Drug-eluting
Intraluminal Device, Drug-eluting identifies a single device placed within a body lumen, such as a coronary stent, that releases a pharmacologic agent to reduce restenosis or promote healing at the implantation site. It is distinguished from a plain Intraluminal Device lacking drug coating and from the numbered drug-eluting variants (Two, Three, Four or More), which indicate that multiple such devices were placed in one procedure.
Coding & Documentation
Coding a Dilation requires documentation of the artery treated and whether a stent was deployed, since the device value changes between no device, a drug-eluting stent, a non-drug-eluting stent, or an intraluminal device without drug coating. The approach, percutaneous versus open, also affects code selection. A frequent error is failing to capture a stent placed during the same session as a separate consideration, when in fact PCS bundles the stent into the Dilation code's device character rather than coding it separately; another is confusing pre-dilation performed to facilitate stent placement, which is not coded independently, with a therapeutic dilation of a different vessel.