Wiki Modifer AI

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can anyone help me?


Scenario
Medicare Patient

Patient was seen in the ED on 01/04/10. The ED billed for their service. Looking over the inpatient case data in our system it reads that the admitting doctor was a surgeon. So now on 01/04/10 the surgeon billed for their service (99221-3). On 01/05/10 the patient is seen by the Cardiologist (inpatient service) which then bills for their service visit (99221-3).

My Question:
-can ED physicians use modifier AI?
-Is it the Cardiologist who should be responsible for appending modifier AI since they are hospital inpatient?
-Or is it the surgeon who should append modifier AI because they admitted the patient?

Thank you for all your help!
 
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