At our local hospital we are contracted for the supervision and interpretation of stress echo's. We are not hospital employee's. We are billing 93350-26, 93016 and 93018. The hospital is billing 93351 for the exam. We have some concerns about this. Everything i have read leads me to believe that 93351 would be used in the office setting, or possibly if we were employed by the hospital and they paid us. In our situation what should the hospital be billing?Any thoughts?