021Q0KB
Bypass Pulmonary Artery, Right to Subclavian with Nonautologous Tissue Substitute, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 2 Heart and Great Vessels |
| Operation | 1 Bypass |
| Body Part | Q Pulmonary Artery, Right |
| Approach | 0 Open |
| Device | K Nonautologous Tissue Substitute |
| Qualifier | B Subclavian |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Bypass procedures on the heart and great vessels reroute blood around a blocked or narrowed segment of a coronary artery or great vessel, restoring blood flow to tissue that would otherwise be starved of oxygen. Coronary artery bypass grafting is the best-known example, where a segment of the patient's own vein or artery, or a synthetic conduit, is connected from the aorta to a point on a coronary artery past a blockage, giving blood a new path around diseased, narrowed vessel. These procedures are performed for significant coronary artery disease or great vessel obstruction that cannot be adequately managed with medication or a less invasive approach like angioplasty.
Bypass is distinct in ICD-10-PCS because the coded body part is the vessel supplying blood (the origin of the bypass) and the qualifier identifies the vessel or structure the flow is being routed to, rather than the blockage itself being treated. The number of vessels bypassed and the conduit material both matter clinically and for coding, since a triple bypass using a mix of arterial and venous grafts is captured as separate codes for each distinct bypass performed.
Anatomy & Axis Detail
Pulmonary Artery, Right
The right pulmonary artery carries deoxygenated blood specifically to the right lung, and bypass procedures targeting it are typically performed in congenital repairs where this branch is hypoplastic, discontinuous from the main pulmonary trunk, or affected by conditions like pulmonary atresia with major aortopulmonary collateral arteries. Surgeons construct a conduit, often originating from the right ventricle or another central vessel, to establish or restore continuous flow into the right pulmonary arterial bed when direct reconstruction is not feasible. Because this vessel branches early from the pulmonary trunk and runs behind the aorta and superior vena cava, the surgical approach must account for these adjacent structures when routing the conduit. Documentation should identify the precise origin of the bypass, the right pulmonary artery as the distinct target separate from the left, and the conduit material, since laterality here changes the coded body part.
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: Nonautologous Tissue Substitute
Nonautologous Tissue Substitute refers to biologic material sourced from a donor or another species, such as an allograft or xenograft, used to replace a body part. It differs from Autologous Tissue Substitute by tissue origin outside the patient's own body, and from Synthetic Substitute by being biologic rather than manufactured material.
Qualifier: Subclavian
This qualifier designates a subclavian artery as the bypass destination, commonly seen in procedures addressing arch anomalies or peripheral arterial disease affecting the upper limb inflow. It sits alongside the carotid and axillary qualifiers on the same vascular tree, differing by which downstream branch actually receives the graft.
Coding & Documentation
Coders need the operative note to state, for each individual bypass, the proximal origin of the graft, the distal target vessel, and the type of conduit used - internal mammary artery, saphenous vein, radial artery, or synthetic graft - since each of these determines a distinct body part, qualifier, and device value. A common mistake is coding all grafts in a multi-vessel bypass under one code rather than one code per distinct vessel bypassed, since PCS requires each bypass with a different body part or qualifier combination to be reported separately. Documentation should also make clear whether the procedure was done via open sternotomy or a minimally invasive approach, since the approach value changes accordingly, and confirm whether cardiopulmonary bypass (extracorporeal circulation) was used, which is captured with a separate code for the perfusion service itself.