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0CHY Mouth and Throat
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0CHY0 Open
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0CHY3 Percutaneous
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0CHY7 Via Natural or Artificial Opening
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0CHY71 Radioactive Element
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0CHY71ZInsertion of Radioactive Element into Mouth and Throat, Via Natural or Artificial Opening
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0CHY7B Intraluminal Device, Airway
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0CHY7BZInsertion of Airway into Mouth and Throat, Via Natural or Artificial Opening
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0CHY7Y Other Device
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0CHY7YZInsertion of Other Device into Mouth and Throat, Via Natural or Artificial Opening
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0CHY8 Via Natural or Artificial Opening Endoscopic
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0CHY81 Radioactive Element
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0CHY81ZInsertion of Radioactive Element into Mouth and Throat, Via Natural or Artificial Opening Endoscopic
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0CHY8B Intraluminal Device, Airway
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0CHY8BZInsertion of Airway into Mouth and Throat, Via Natural or Artificial Opening Endoscopic
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0CHY8Y Other Device
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0CHY8YZInsertion of Other Device into Mouth and Throat, Via Natural or Artificial Opening Endoscopic
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0CHYX External
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0CHYX1 Radioactive Element
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0CHYXB Intraluminal Device, Airway
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0CHYXY Other Device
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