Not going to pay for screening scans
Jennifer, I'm not quite sure why you need to do the OCT to see if there's diabetic retinopathy. When the doctor examines the patient through the dilated pupil, they should be able to detect any signs of DR. Realistically, you're going to see retinal hemorrhages in the vast majority of cases before you will see any macular edema.
Therefore, if no retinal hemorrhages are noted, there isn't really a need to do a macular OCT unless macular changes are detected without any hemorrhages, in the rare cases where that occurs.
If you find the DR, then you can code the E10 or E11 code with the appropriate description of the level of DR with or without macular edema and bill the OCT and it should be paid. Otherwise, without any signs of DR or edema, your OCT scan are realistically just screening scans and won't be paid by any insurer. If you want the patient to pay for these screening scans, then you need to use either an ABN, if you're still going to file for the OCT without the DR, or have them do a NEMB form and just have them pay you up front.
Tom Cheezum, O.D., CPC, COPC