Our physician has been performing CPT 64635 and 64636, destruction by neurolytic agent, paravertebral facet joint nerve(s) on the right side and then three weeks later treating the left side. Since we can bill for radiofrequencies twice per year, she repeats this process a second time so that the patient has a total of four treatments. I'm not sure why she's not doing the procedure bilaterally but can she continue performing and billing this procedure like this? I hope this makes sense. Any help I can get will be much appreciated!