212.0 Nasal cavities, middle ear, and accessory sinuses
Cartilage of nose
Eustachian tube
Nares
Septum of nose
Sinus:
ethmoidal
frontal
maxillary
sphenoidal
Excludes:
auditory canal (external) (216.2)
bone of:
ear (213.0)
nose [turbinates] (213.0)
cartilage of ear (215.0)
ear (external) (skin) (216.2)
nose NOS (229.8)
skin (216.3)
olfactory bulb (225.1)
polyp of:
accessory sinus (471.8)
ear (385.30-385.35)
nasal cavity (471.0)
posterior margin of septum and choanae (210.7)