We have a scenario where 2 different APPs are providing E/M services to the same patient on the same day, ex: APP 1 sees patient in morning for consultation. APP 1 leaves for the day so APP 2 follows-up that evening to follow up on additional imaging, explain an additional procedure and measure a cardiac index. Since we can only bill one E/M service per day, can we combine the two visits for billing? And who would it be billed under- APP 1 or APP 2?