Laryngeal hypoplasia

This code represents a congenital anomaly characterized by the underdevelopment or incomplete formation of the larynx. This structural defect can lead to varying degrees of airway obstruction and respiratory distress, depending on the severity of the hypoplasia.

Use this code for patients diagnosed with a congenitally small or underdeveloped larynx. Documentation should clearly state "laryngeal hypoplasia" or describe a hypoplastic larynx identified through imaging (e.g., laryngoscopy, CT scan) or clinical examination. This code is appropriate for both symptomatic and incidentally discovered cases.

• Differentiate from other congenital laryngeal anomalies like laryngomalacia (Q31.5) or laryngeal web (Q31.0).
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it contributes to the patient's overall condition.
• Ensure the medical record specifies "hypoplasia" rather than general laryngeal underdevelopment to support this specific code.