LCD policy for CPT 64635 states: A maximum of two (2) facet destruction sessions per nerve level per year may be performed in the lumbar region. Does this mean only 2 (no matter what side), or 2 on the left (L3-L5) and 2 on the right (L3-L5) same levels only different sides. Our office has started getting denials on these. Also does the year go by Jan-Jan or rolling calender year? Any help would be appreciated.