Is it possible to charge for contrast injection under ultrasound guidance for a diagnostic mammogram?

Our radiologists want to inject some contrast into a breast with US guidance, prior to a dx mammo in order to correlate what is seen on US as a followup to a prior mammo.

Here's what the Breast Cooridinator told me.
“When there is an abnormality on mammogram and they aren't sure if the area they see on US is the same they inject the optiray under US and then take a mammogram to see if they correlate”

Based on that, I am thinking that she's already had a mammo; US was recommended and performed but now they are trying to see if the area in the US matches the mammo, so we inject contrast under US guidance and then they repeat a mammo.

Any thoughts or suggestions?