One of the doctors in my practice did an EGD with biopsy, patient went home and the next day presented to the ER with a GI bleed. Patient had another EGD and it was determined that the bleed was related to the first EGD. I know there is no global period for an EGD so would I still have to use a modifier to alert the insurance company that the two procedures are related? If so, which one would I use? 58, 76 or 78? Thanks for any help!