I need clarification from someone in the pain management world. My provider is performing a genicular nerve blocks where he indicates he injected the superior medial and lateral epicondyles of the femur as well as the distal aspects of the medial tibial epicondyle. I have read that CPT 64450 is per nerve or branch not per injection. Per my physician he gave the injections into different branches of the femoral nerve. How would I code this? 64450 only once? 64450 with 3 units? 64450 on multiple lines with -51 modifier? Any help is appreciated.