Most surgeons do not do enough cases over their entire careers to be meaningfully compared to their peers. There was a big paper about this recently. The ratings are a sham meant to instill false confidence.
I found this for hospital-level comparisons (these should be much more accurate due to far larger numbers): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4250275/#!po=2....
However: "Most commonly reported outcome measures have low reliability for differentiating hospital performance."