What is the purpose behind codes +93571 and +93572?
Intravascular distal coronary blood flow velocity measurement are add-on codes (+93571 and +93572) signified by a “+” preceding the code. The intravascular blood flow velocity measurement procedure uses a guide wire technique, which is advanced into a coronary vessel through a catheter. The guidewire has a Doppler transducer at its end. Blood flow velocity is performed either during a cardiac catheterization procedure or other therapeutic intervention. The wire is placed distal to a coronary lesion, for example, and measurements are obtained using ultrasound (Doppler transducer) and from there hemodynamic measurements are made. These measurements help determine if an intervention may be necessary. These codes are most commonly referred to as FFR, DFR (diastolic hyperemia-free ratio), or IFR (instant wave-free ratio). IFR and DFR provide the same measurement without the use of adenosine or a stressing agent. This procedure may also be performed following an intervention.
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