I sent a CT scan of a patient to an outside radiology reading service. I would like to include this service, which I pay for, on form 1500. I am thinking of using CPT 76140 with modifier -26, is this correct? Also, what do I write under “rendering provider ID #”? I didn”t perform the service so I can”t write my NPI, but I did pay the outside facility for it. Is this actually possible to do? Thank you