Wiki trach suctioning - Can anyone tell me if CPT code 31720

It isn't for tracheostomy suctioning. 31720 is suctioning the trachea via the nose, often using a flexible nasal trumpet in which to introduce the suction catheter.
 
trach suctioning

Thanks, so if 31720 isnt used for trach suctioning what should be coded?
 
CPT code 31720

In the CPT book it states 'separate procedure"
Does this mean we cannot bill for it when we are performing another respiratory therapy service?
 
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