0T14478
Bypass Kidney Pelvis, Left to Colon with Autologous Tissue Substitute, Percutaneous Endoscopic Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | T Urinary System |
| Operation | 1 Bypass |
| Body Part | 4 Kidney Pelvis, Left |
| Approach | 4 Percutaneous Endoscopic |
| Device | 7 Autologous Tissue Substitute |
| Qualifier | 8 Colon |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Bypass procedures in the urinary system reroute the flow of urine around a damaged, obstructed, or diseased segment so it can drain through a new path instead. Common examples include an ileal conduit or continent urinary diversion after bladder removal, a ureteroneocystostomy that reconnects a ureter to the bladder at a new site, or a yeloureteral bypass for a blocked ureteropelvic junction. These operations are performed when a tumor, stricture, chronic obstruction, or a failed bladder makes normal drainage unsafe, since backed-up urine can damage the kidneys or cause repeated infections.
Patients typically encounter these procedures alongside cancer treatment, after trauma, or when a congenital narrowing has caused progressive kidney damage. The new pathway may be temporary, to protect a healing repair, or permanent, when the original structure cannot be salvaged.
Anatomy & Axis Detail
Kidney Pelvis, Left
The left kidney pelvis collects urine from the major calyces before it drains into the ureter, and bypass is performed when a fixed obstruction at or near the ureteropelvic junction cannot be relieved by simpler means, threatening progressive hydronephrosis and loss of renal function. Rerouting urine flow around the blocked segment protects the kidney while avoiding removal of functioning parenchyma. On the left side, the procedure occurs near the spleen, splenic flexure of the colon, and left renal vessels, which shapes the operative approach relative to the right. The new conduit created during bypass, whether to the ureter, another segment of urinary tract, or an external stoma, becomes the qualifier that defines the procedure, and accurate identification of that route is essential for correct code assignment.
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: Autologous Tissue Substitute
Autologous Tissue Substitute identifies a device value where material harvested from the patient's own body, such as an autograft, is used to replace or reconstruct a body part. Its defining feature is tissue origin from the patient, setting it apart from Nonautologous Tissue Substitute, sourced from a donor or animal, and Synthetic Substitute, made of manufactured material.
Qualifier: Colon
Colon as a qualifier specifies that a bypass procedure reroutes flow into the large intestine, as seen in urinary diversions like ureterosigmoidostomy where urine is redirected into the colon. It marks the colon as the receiving conduit rather than the primary treated organ. This differs from Colocutaneous, where the created pathway instead exits through the skin.
Coding & Documentation
Coders assign Bypass when documentation confirms a new route was created "from" one urinary structure "to" another (or to the skin, as in a conduit), rather than a repair of the existing channel. The operative note must name both the bypass origin and the qualifier destination, since the seventh-character qualifier changes with the target (bladder, ileum, cutaneous, etc.). A frequent error is coding Bypass when the surgeon actually performed Repair or Dilation of an existing passage rather than constructing an alternate route; another is missing the correct device value when a stent or conduit segment is left in place.