CA00-CA0Z block
Upper respiratory tract disorders
Definition
This group of disorders refers to diseases of the upper airways (upper respiratory tract). The upper airways anatomically are complicated structures which extend from the airway openings at the nares and lips to the trachea. The term upper airways includes several anatomically distinct regions. The nose constitutes the upper segment, followed by the nasopharyngeal and oropharyngeal airways, which extend from the nasal choanae and oral cavity to the supraglottic space. The paranasal sinuses drain into the nasal cavities and are attached to the lateral, posterior, and superior aspects of the nose. The larynx divides the upper and lower airways, although some place it in the thoracic inlet.
Exclusions
22 subordinate codes
CA00Acute nasopharyngitisCA01Acute sinusitisCA02Acute pharyngitisCA03Acute tonsillitisCA04Acute laryngopharyngitisCA05Acute laryngitis or tracheitisCA06Acute obstructive laryngitis or epiglottitisCA07Acute upper respiratory infections of multiple and unspecified sitesCA08Vasomotor or allergic rhinitisCA09Chronic rhinitis, nasopharyngitis or pharyngitisCA0AChronic rhinosinusitisCA0BSilent sinus syndromeCA0CCyst or mucocele of nose or nasal sinusCA0DDeviated nasal septumCA0EHypertrophy of nasal turbinatesCA0FChronic diseases of tonsils or adenoidsCA0GChronic laryngitis or laryngotracheitisCA0HDiseases of vocal cords or larynx, not elsewhere classifiedCA0JNasal polypCA0KAbscess of upper respiratory tract4B4YOther specified diseases of the immune system4B4ZDiseases of the immune system, unspecified
Nearby in Diseases of the respiratory system
CA20-CA2ZCertain lower respiratory tract diseasesCA40-CA4ZLung infectionsCA60-CA8ZLung diseases due to external agentsCB00-CB0ZRespiratory diseases principally affecting the lung interstitiumCB20-CB2ZPleural, diaphragm or mediastinal disordersCB40Certain diseases of the respiratory systemCB41Respiratory failureCB60-CB64Postprocedural disorders of the respiratory system