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099X Sphenoid Sinus, Left
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099X0 Open
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099X3 Percutaneous
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099X4 Percutaneous Endoscopic
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099X7 Via Natural or Artificial Opening
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099X8 Via Natural or Artificial Opening Endoscopic
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099X80 Drainage Device
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099X80ZDrainage of Left Sphenoid Sinus with Drainage Device, Via Natural or Artificial Opening Endoscopic
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099X8Z No Device
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099XX External
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099XX0 Drainage Device
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099XXZ No Device
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