Revision of total hip, 1 component or 2 components

Crawfordville, FL
Best answers
I have found very little in my research to answer this question and need advice. My provider removed and replaced the femoral head, stem and liner but not the acetabulum shell. I did find something from 2009 from Margie Vaught that instructed to use 27134,52 (both components, reduced services) but I have also been told that the hip prosthesis consists of 4 components and the shell would be considered part of the acetabular component so 52 modifier is not necessary. Does anyone have advice or any documentation more current than 2009 for this issue, Thanks in advance for any help.