- Nasal endoscopy, diagnostic, unilateral or bilateral
- Nasal flu vaccine
- Nasal/sinus endoscopy, surgical with ethmoidectomy; partial
- Nasal/sinus endoscopy, surgical with ethmoidectomy; total
- Nasal/sinus endoscopy, surgical, with frontal sinus exploration
- Nasal/sinus endoscopy, surgical, with maxillary antrostomy;
- Nasal/sinus endoscopy, surgical, with sphenoidotomy
- Nebulizer Treatment
- Nephelometry, test method using light
- Neuroplasty and/or transposition; ulnar nerve
- Neurostimulator pulse generator
- New patient office of other outpatient visit, typically 45 min
- New patient office of other outpatient visit, typically 60 min
- New patient office or other outpatient visit, typically 30 min
- New patient office or other outpatient visit, typically 30 min
- New preventative visit in new patients 12-17 years old
- New preventative visit in new patients 12-17 years old
- New preventative visit in new patients 5-11 years old
- New preventative visit in new patients 5-11 years old
- Non-selective debridement
- Nucleotidase 5' (enzyme) level