A routine EEG consists of at least a twenty minute recording with referential and bipolar montages and at least eight channels (except in neonates). Hyperventilation and photic stimulation should be done in all cases where clinically possible.
G414 is not eligible for payment with G541.
EEG services (i.e. G414, G415, G418, G541, G543, G540, G545, G542, G546, G554, G555, or G544) are not eligible for payment with any overnight or daytime sleep study (i.e. J898, J899, J990, J896, J897, J895, J890, J889, J893 or J894).