MD11.8 Mouth breathing

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Breathing through mouth. Nasal obstruction may also necessitate mouth breathing, which itself can precipitate obstructive apnoea. Breathing through the mouth may also increase risk for OSA by its effect on the tongue. The tongue forms the anterior wall of the oropharynx; both the supine posture and opening of the mouth tend to displace it posteriorly and encourage airway closure.

exclusions

• Dry mouth  (DA02.1)

sections/codes in this section (MD11.8-MD11.8)

• Stertor  (MD11.80)
• Other specified mouth breathing  (MD11.8Y)
• Mouth breathing, unspecified  (MD11.8Z)

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