The surgeon I work for performed an EGD and Colonoscopy on this particular patient, and about 3 weeks later he does an EGD with placement of percutaneous gastrostomy tube, 5 days later a tracheostomy, now another 3 weeks later he does an EGD should I have billed this EGD with a modifier? The insurance is denying "The benefit for this service is included in the payment/allowance for another service/procedure that has already been adjudicated." Thank you in advance for your assistance.