MR Shoulder Arthrography

Answer

I found two sources that indicated it was rare for a conventional arthrogram to be reported with a MR arthrography.  The most common coding for MR arthrography would be 73222 and 23350 for the shoulder injection.  If the injection was done under fluoro guidance, 77002 can be added.  If a formal diagnostic joint arthrography is done in addition to the MR arthrography, there should be a separate order for this separate diagnostic test.

MRI
Magnetic resonance imaging (MRI), nuclear magnetic resonance imaging (NMRI), or magnetic resonance tomography (MRT) is a medical imaging technique used in radiology to visualize detailed internal structures. The good contrast it provides between the different soft tissues of the body make it especially useful in brain, muscles, heart, and cancer compared with other medical imaging techniques such as computed tomography (CT) or X-rays. Unlike CT scans or traditional X-rays MRI uses no ionizing radiation. Instead it uses a powerful magnetic field to align the magnetization of some atoms in the body, then uses radio frequency fields to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body.