Hi everyone, I have a question. We have a patient who underwent LEV (93970) and LEA (93925) procedures on the same day. In addition to the E/M codes with modifier 25, should I use modifier 51 to indicate that one of the procedures is secondary to the primary one? Also, is modifier 51 applicable for in-house tests such as UA (81003), A1c (81003), and EKG (93000) that were performed on the same date of service (DOS)?