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The code pair you listed below (57505 & 58100) generates a non-modifiable CCI edit for both the physician and facility billing; they should not be reported together. If both were performed and documented only 57505 would be reported.
If the codes had a CCI edit that allowed a modifier override, modifier 59 would be the one to use instead of modifier 51. The 51 modifier is informational only for multiple procedures.