In our practice, our cardiologists round on inpatient, billing 99231-99233. Often, these patients also have echos and EKGs done. But the way we gather all this is on seperate systems. So by the time we enter charges, the E/Ms are submitted on different claims than the testing reads. So, ultimately, we do not use modifiers. Also, often these are different doctors within the same specialty (cardiology) bt sometimes it could be the same doc billing both.
I'm not sure if that is correct or not, but that is how our practice does it