04SB0ZZ
Reposition Inferior Mesenteric Artery to No Qualifier with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 4 Lower Arteries |
| Operation | S Reposition |
| Body Part | B Inferior Mesenteric Artery |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Moving to its normal location, or other suitable location, all or a portion of a body part
Procedure Overview
Reposition procedures move an artery, or a segment of one, to a different location or restore it to its proper anatomic position without removing tissue or adding replacement material. In the lower extremities and pelvis this is an uncommon but important root operation, most often encountered when an artery has been displaced by trauma, congenital anomaly, or a prior surgical dissection and needs to be moved to a location where it functions correctly or does not interfere with another planned procedure.
Examples include transposing a renal or iliac artery during complex aortic reconstruction, or relocating a vessel during organ transplantation to create adequate inflow to a transplanted kidney. The vessel itself is not resected or replaced; it is detached at one end and reattached in a new position or orientation.
Anatomy & Axis Detail
Inferior Mesenteric Artery
The inferior mesenteric artery supplies the descending colon, sigmoid colon, and upper rectum from a low origin on the abdominal aorta, a location frequently disrupted during open repair of abdominal aortic aneurysms. Reposition is used when this vessel's origin is reimplanted onto a new site, such as an aortic graft, to preserve colonic blood supply that would otherwise be sacrificed with the diseased aortic segment. Because the artery is often small and may already have limited collateral flow through the marginal artery of Drummond, precise relocation can be critical to preventing ischemic colitis. Operative notes should clarify whether the vessel was truly repositioned to a new attachment point versus ligated, since failure to preserve or relocate it appropriately carries meaningful clinical consequence for postoperative bowel viability.
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.
Coding & Documentation
Coders need operative documentation that clearly states the artery was moved to a new location, not simply exposed, clamped, or repaired in place, since Reposition requires an actual change in anatomic position. The note should specify the originating and destination location of the vessel, which affects the body part value selected.
A frequent mistake is coding a transposition performed as part of a larger transplant or bypass procedure as a separate Reposition when it is actually an integral, non-separately-reportable step of the main procedure. Coders also sometimes confuse temporary retraction or mobilization of a vessel during exposure, which is not coded at all, with true Reposition, which requires a permanent relocation.