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09NB Mastoid Sinus, Right
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09NB0 Open
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09NB0Z No Device
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09NB0ZZRelease Right Mastoid Sinus, Open Approach
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09NB3 Percutaneous
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09NB3Z No Device
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09NB3ZZRelease Right Mastoid Sinus, Percutaneous Approach
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09NB4 Percutaneous Endoscopic
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09NB4Z No Device
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09NB4ZZRelease Right Mastoid Sinus, Percutaneous Endoscopic Approach
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09NB7 Via Natural or Artificial Opening
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09NB7Z No Device
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09NB8 Via Natural or Artificial Opening Endoscopic
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09NB8Z No Device
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09NB8ZZRelease Right Mastoid Sinus, Via Natural or Artificial Opening Endoscopic
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09NBX External
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09NBXZ No Device
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