081Y3Z3
Bypass Lacrimal Duct, Left to Nasal Cavity with No Device, Percutaneous Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 8 Eye |
| Operation | 1 Bypass |
| Body Part | Y Lacrimal Duct, Left |
| Approach | 3 Percutaneous |
| Device | Z No Device |
| Qualifier | 3 Nasal Cavity |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
This family covers procedures that create a new pathway for fluid within the eye, most often to manage glaucoma when standard treatments have not controlled eye pressure. The eye continuously produces a clear fluid called aqueous humor, and in glaucoma this fluid drains too slowly, building up pressure that can damage the optic nerve and threaten vision. A bypass procedure reroutes that fluid around the eye's natural, poorly functioning drainage angle to a new outflow location, typically by implanting a small tube or valve device that channels aqueous humor to a reservoir beneath the eye's outer surface.
Surgeons turn to these procedures, sometimes called glaucoma drainage device or aqueous shunt implantation, when medications and laser treatment have failed to keep pressure at a safe level, or when a patient's anatomy makes more conventional filtering surgery unlikely to succeed. The goal is not to cure glaucoma but to protect remaining vision by keeping pressure within a target range over the long term.
Anatomy & Axis Detail
Lacrimal Duct, Left
The left lacrimal duct carries tears from the lacrimal sac through the bony nasolacrimal canal into the inferior meatus of the nose, and when this pathway is stenotic or fibrosed, tears back up and the sac becomes prone to infection. Bypassing it, typically through a dacryocystorhinostomy, reroutes drainage by fashioning a new opening between the lacrimal sac and nasal mucosa, bypassing the diseased segment of duct entirely. Surgeons may work externally through a periorbital incision or endoscopically through the nostril, and a temporary intubation tube or permanent tube stent is often left in place to keep the new tract patent during healing. Coders should note the surgical approach and whether a device remains, as both distinguish this procedure from simple duct dilation or lysis of adhesions.
Approach: Percutaneous
Percutaneous describes entry by needle or instrument puncture through the skin or mucous membrane to reach the site of the procedure, without cutting the tissue open or using a visualizing scope. It differs from Open in that the site itself is never exposed, and from Percutaneous Endoscopic in that no endoscope is used to see internal structures. Common examples include needle biopsies and injections.
Qualifier: Nasal Cavity
This qualifier designates the nasal cavity as a related anatomic site, most often used where a procedure elsewhere, such as on the ethmoid sinus or nasolacrimal duct, involves or communicates with the nasal passage. It differs from qualifiers naming specific sinuses by referring to the open airway space rather than an enclosed cavity.
Coding & Documentation
Code assignment hinges on the operative note specifying that a device was implanted to establish a new conduit for aqueous humor, along with the qualifier identifying where that fluid is being routed to, such as the subconjunctival space or an external collection reservoir. Documentation should also state which eye and, when relevant, which specific quadrant or structure served as the origin point of the bypass. A common assignment error is defaulting to a drainage or dilation code when the operative report actually describes a device creating a permanent alternate route rather than simply releasing trapped fluid or widening an existing passage. Coders should also confirm the device value matches what was actually implanted, since tube shunts and newer micro-stent devices are captured differently.