B800YZZ
Plain Radiography Lacrimal Duct, Right to None with None, Other Contrast Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | B Imaging |
| Body System | 8 Eye |
| Operation | 0 Plain Radiography |
| Body Part | 0 Lacrimal Duct, Right |
| Approach | Y Other Contrast |
| Device | Z None |
| Qualifier | Z None |
Operation Definition
Planar display of an image developed from the capture of external ionizing radiation on photographic or photoconductive plate
Procedure Overview
Plain radiography of the eye is a conventional x-ray examination of the orbit and surrounding bony structures, most often ordered to look for a radiopaque foreign body lodged in or around the eye. A single or limited series of external x-ray exposures is captured on a photographic or digital plate, producing a flat image that shows dense materials, such as metal, glass, or certain plastics, in sharp contrast to the surrounding soft tissue.
This study is typically requested in emergency settings after trauma involving metalwork, grinding, or an explosion, particularly before an MRI is considered, since a metallic foreign body near the eye can be dangerous once the patient enters a strong magnetic field. It is a fast screening tool rather than a detailed diagnostic study of the eye's internal structures, which are better evaluated with ultrasound, CT, or a slit-lamp examination.
The orbit's thin bones and the eye's soft, fluid-filled structures do not show up with the same detail as denser objects, so a negative plain film does not fully exclude a small or radiolucent foreign body.
Anatomy & Axis Detail
Lacrimal Duct, Right
The right lacrimal duct, more precisely the nasolacrimal drainage system, channels tears from the lacrimal sac at the medial canthus down into the nasal cavity beneath the inferior turbinate. Plain radiographic imaging of this duct, known as dacryocystography, requires injecting contrast material through the punctum so the normally invisible passage becomes outlined on film. This study is ordered to evaluate epiphora, or excessive tearing, caused by suspected stenosis, obstruction, or dacryolith formation somewhere along the duct's course, and it helps distinguish a blockage at the sac from one lower in the nasolacrimal canal. Because the duct is a narrow, curved structure adjacent to the nasal bones, precise cannulation technique and positioning are needed to obtain diagnostic images specific to the right side.
Contrast: Other Contrast
Other Contrast captures imaging studies using a contrast medium that is neither high- nor low-osmolar iodinated agent, such as barium sulfate for gastrointestinal studies or gadolinium-based agents for certain applications outside standard MRI classification within this axis. It is used when the contrast administered does not fit the osmolarity-based iodinated categories, distinguishing it from those specific classes and from studies performed with no contrast.
Coding & Documentation
Coders select this code when documentation confirms a conventional x-ray, not CT, was used to image the orbit or globe, most commonly for foreign body localization. The report should specify whether one or both eyes were examined, since laterality affects the body part value assigned.
A common error is coding a plain skull or facial x-ray series that only incidentally includes the orbits to this family, when the intent and documentation should clearly show the eye itself was the structure being evaluated. Another frequent mix-up is applying this code when the actual study performed was a CT of the orbits, which many facilities order instead of plain film for suspected metallic foreign bodies; the modality documented in the radiology report, not the clinical indication, determines the correct code.
Commonly Confused With
This family is most often confused with CT of the eye, which is now the preferred modality for foreign body detection and orbital fracture evaluation in many centers because it offers far greater sensitivity and localization detail. It is also distinct from plain radiography of the skull or facial bones, which images a broader anatomic region and is coded to a different body system unless the eye itself is specifically the documented target.