Arkansas Subscriber
Answer: Report 27134 (Revision of total hip arthroplasty; both components, with or without autograft or allograft) with modifier -52 (Reduced services) appended. When a revision arthroplasty involves the acetabular component(s), whether the liner or shell or both components are replaced has limited impact on the difficulty of the procedure. When only the femoral head (not the stem) is replaced, the procedure becomes much less complex. Because your physician only replaced the femoral head and left the existing stem in place, the reduced-services modifier is appropriate.