091D070
Bypass Inner Ear, Right to Endolymphatic with Autologous Tissue Substitute, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 9 Ear, Nose, Sinus |
| Operation | 1 Bypass |
| Body Part | D Inner Ear, Right |
| Approach | 0 Open |
| Device | 7 Autologous Tissue Substitute |
| Qualifier | 0 Endolymphatic |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Bypass procedures in the ear, nose, and sinus system reroute the flow of contents, such as tears or sinus drainage, around a blocked passage by creating a new connecting channel to a different destination. The best-known example is dacryocystorhinostomy, which creates a new drainage pathway from the tear sac into the nasal cavity when the natural tear duct is blocked, allowing tears to drain normally instead of overflowing onto the face.
These procedures are performed when a natural passage has become obstructed by scarring, chronic infection, or structural narrowing, and simply widening or clearing the original channel is not enough to restore function. Instead of repairing the blocked route, the surgeon builds an alternate path that lets fluid bypass the obstruction entirely.
Patients typically come to this procedure after recurring infections, chronic tearing, or drainage problems that have not resolved with less invasive treatment, and the new pathway is intended to be a lasting solution rather than a temporary fix.
Anatomy & Axis Detail
Inner Ear, Right
Bypass procedures involving the right inner ear reroute a pathway around a damaged or nonfunctioning cochlea, most commonly through cochlear implantation, where an electrode array is threaded into the cochlea to bypass the natural hair cell mechanism and stimulate the auditory nerve directly. Because the inner ear's structures are microscopic and encased within dense temporal bone, this requires a surgical approach through the mastoid to reach the cochlea safely, with imaging and audiometric assessment guiding electrode placement. The bypass restores a functional pathway for sound signal transmission in patients with severe sensorineural hearing loss unresponsive to conventional amplification. Coding should identify the destination of the bypassed pathway - typically the auditory nerve or an external device interface - since this determines the qualifying body part in code selection.
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: 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: Endolymphatic
This qualifier identifies the endolymphatic duct or sac of the inner ear, structures involved in fluid regulation and implicated in conditions like Meniere's disease. It is used in procedures such as endolymphatic sac decompression, distinguishing this fluid-filled inner ear structure from the surrounding bony labyrinth.
Coding & Documentation
Coding requires documentation of both the origin of the rerouted flow and where it is redirected to, since Bypass codes capture both the body part bypassed and the qualifier representing the new route or destination. Operative notes should describe the creation of a new connection or stoma, distinguishing this from simply clearing or dilating the existing passage.
A frequent mistake is coding Dilation when the surgeon actually created an entirely new pathway rather than widening the native one - Bypass applies only when a new route is established. Coders should also verify the qualifier value correctly reflects the anatomic destination of the new pathway, since choosing the wrong destination value is a common source of code errors in this family.