Question: Louisiana Subscriber Answer: From your question we will assume the GI postponed the repeat EGD for another day to allow the food to pass into the small intestine so the stomach is clear enough for visualization. Upper endoscopy examinations have a global period of zero days (e.g., 43235, Upper gastrointestinal endoscopy including esophagus, stomach, and either the duodenum and/or jejunum as appropriate; diagnostic, with or without collection of specimen[s] by brushing or washing [separate procedure], and 43244, ...with band ligation of esophageal and/or gastric varices). You should use the CPT procedure code(s) that correspond to the service(s) performed on the follow-up EGD and the ICD-9 code(s) for the indications and findings. EGD procedures on a subsequent day do not need any additional modifier as might be needed when a repeat examination takes place on the same calendar day (i.e., modifier 78, Unplanned return to the operating/procedure room by the same physician following initial procedure for a related procedure during the postoperative period).