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Chapters
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Extension Codes
Anatomy and topography
Functional anatomy
Respiratory system
XA8Z63
category
Upper respiratory tract
4 subordinate codes
XA43C9
Nasal cavity
XA3523
Accessory sinuses
XA9AZ1
Nasopharynx
XA2RH5
Larynx
Also indexed as
Nasal cavity and middle ear
Upper respiratory tract
Upper respiratory tract, NOS
Nearby in Respiratory system
XA07R2
Lower respiratory tract
Next
XA07R2 — Lower respiratory tract