I need some help on the correct use of modifier 25 and 27 on two ER visits on the same day on a Medicare patient. Since this is a Medicare patient, the two visits must be combined on the billing side, since they were on the same date of service. Do I need to add the modifier 25 to each E/M level plus the modifier 27 to the second visit? Or do I need to add modifier 25 just to the first E/M level and only the modifier 27 to the second visit? I can't seem to find clarity in the CPT Assistant or any where else. Any help would be appreciated. Thanks!