ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Symptoms, signs or clinical findings of speech or voice
Symptoms or signs involving speech or voice
MA82 — Voice disturbances
MA82.2 — Nasality

ICD-11 MA82.2 — Nasality

Nasality (or resonance) refers to the quality of the voice that is determined by the balance of sound vibration in the oral, nasal, and pharyngeal cavities during speech. Abnormal resonance can occur when there is obstruction in one of the cavities, causing hyponasality, or when there is velopharyngeal dysfunction, causing hypernasality. This category should only be assigned when hyponasality or hypernasality is outside the limits of normal variation and results in reduced intelligibility and significantly affects communication.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.