Us scrotal with doppler

What is the criteria for billing 93975 or 93976 with 76870? We have not been billing these 2 code together, but want to make sure we are not missing something we should be billing. If the dr is doing "scrotal sonogram with color doppler imaging" and notes "appropriate flow is noted in both testicles by color doppler analysis" is this enough to bill 93976? Can someone direct me to documentation to support billing this charge? Thanks for any assistance with this problem

76870 and 93976

A quick-look use of color flow Doppler simply to verify whether an anatomic structure is vascular should not be separately coded. To separately code for Duplex scanning, evaluation of blood flow—both arterial inflow and venous outflow—must be performed in addition to a gray scale evaluation. Documentation of an order from a physician for both examinations should be maintained, and medical necessity must be present, as always. An order from the referring physician is required in the freestanding (i.e., nonhospital) and independent diagnostic testing facility settings.

Scrotal us

thank you so much for the help!