Hello
I do not have much experience in ultrasound billing, but I do know few things and I would like to share.
--You need to run EL with insurances to know which code covers under patient's plan.
--You can bill US in primary visit, but with some short of limitation. It depends on the diagnosis. Like CPT 10005 is for biopsy, and you can't run the biopsy in very first visit with out doctor comes to diagnose (and no doctors does that), take example of skin infection.
--On the other hand you can bill some codes like 76942 it's for ultrasound needle placement. take example of a patient comes with chest pain and doctors give a shoot to his hart with US, in this case you can bill, both EM for an emergency, and appropriate Injection code, US code, Drug code with NDC with proper diagnosis & modifier.
So if in second case insurance denied claim, you have patient's medical records and the emergency form can help you to pass it.
So you need to be litter more specific that what diagnosis you billed and need to came up with pretty good argument that why insurance needs to pay.
Like I said I do not have much experience with this, so if this helps then good, if not then please anyone can correct me and I will appreciate with words.
Best.