07190Z7
Bypass Lymphatic, Internal Mammary, Left to Lymphatic with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 7 Lymphatic and Hemic Systems |
| Operation | 1 Bypass |
| Body Part | 9 Lymphatic, Internal Mammary, Left |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | 7 Lymphatic |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Lymphatic bypass procedures reroute the flow of lymph fluid around a damaged, blocked, or missing segment of the lymphatic system, most often by surgically connecting a lymphatic vessel or node directly to a nearby vein. The best-known example is lymphaticovenous anastomosis (LVA), a microsurgical technique used to treat chronic lymphedema, the swelling that develops when lymph fluid cannot drain properly, commonly after cancer treatment that removed or irradiated lymph nodes.
By creating a new drainage pathway into the venous system, surgeons aim to reduce swelling, lower the risk of skin infections such as cellulitis, and improve limb mobility and comfort. These are delicate operations performed under high-powered microscopes because the vessels involved can be smaller than a millimeter in diameter.
Outcomes vary depending on how much lymphatic damage has already occurred, so patients are often evaluated with imaging beforehand to confirm the procedure is likely to help.
Anatomy & Axis Detail
Lymphatic, Internal Mammary, Left
On the left, the internal mammary lymphatic chain parallels the internal thoracic vessels and provides drainage for the medial breast and anterior chest wall, becoming clinically significant when standard axillary lymphatic pathways have been disrupted by prior surgery or radiation. A bypass in this region reroutes obstructed lymph flow, often into an adjacent venous structure, to relieve swelling or lymphatic leakage localized to the chest wall or breast. This procedure is particularly relevant in patients who have undergone left-sided mastectomy with internal mammary node sampling, where scarring can impede normal drainage. As with the right-sided counterpart, the deep retrosternal position of these vessels requires careful surgical planning, and coders should confirm the specific destination structure documented for the new lymphatic route.
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.
Qualifier: Lymphatic
This qualifier identifies a lymphatic vessel as the object of the procedure, distinct from a lymph node, used for interventions such as lymphangiography or lymphatic channel repair. It differs from the more specific Thoracic Duct and Cisterna Chyli qualifiers, which name particular structures within the lymphatic system rather than lymphatic vessels generally.
Coding & Documentation
Coders assign a bypass code from this family when the operative note describes a new conduit created between a lymphatic structure and another body part, such as a vein, rather than simple repair or removal. The documentation must identify both the lymphatic site of origin and the specific body part the flow is now routed to, since PCS bypass values are built around that origin-to-destination relationship.
A frequent error is confusing lymphaticovenous anastomosis with a simple repair code when the surgeon's language is ambiguous; coders should look for explicit anastomosis or rerouting language rather than assuming intent. Another pitfall is missing the qualifier for the destination structure, which changes the code entirely.