We had a patient set up a screening colonoscopy who uses a Medicare replacement plan with Medica. As per usual, I went onto Medicare's website to verify that they're eligible to have a screening colonoscopy. It did confirm that the patient was eligible as of 6/01/2019. Patient had the procedure and I submitted the claim. We got a denial stating the patient was ineligible. I called for an explanation and was told the patient just had one in November of 2019 that they covered. Does anyone know where I should go from here? I have the printout from Medicare that shows the patient was eligible, so it's an error on their side somewhere. But since they're not the ones to process the claim, not sure how to fight Medica as have found out since that they are correct and the patient did have one elsewhere in 2019.