64415 has a muliple surgery payment indicator of two.
"2 - Standard payment adjustment rules for multiple procedures apply."
"Standard payment adjustment rules for multiple procedures apply. If procedure is reported on the same day as another procedure with an indicator of 1, 2, or 3, rank the procedures by fee schedule amount and apply the appropriate reduction to this code (100%, 50%, 50%, 50%, 50% and by report). Base the payment on the lower of (a) the actual charge, or (b) the fee schedule amount reduced by the appropriate percentage. " from Medassets
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Although I getting a server error when trying to access physician fee schedule look up for 01630 I would assume the multiple surgery payment indicator would NA for this code and 64415 would not be subject to the 50% adjustment.