Paralysis of vocal cords and larynx, unilateral

This code signifies a loss of motor function in one of the vocal cords and/or the laryngeal muscles, leading to impaired voice production and potentially breathing or swallowing difficulties. It indicates that only one side of the larynx is affected by the paralysis.

Use this code when documentation clearly states unilateral vocal cord or laryngeal paralysis. This often presents with hoarseness, breathiness, or aspiration, and is typically diagnosed via laryngoscopy. Supporting documentation should specify the laterality of the paralysis.

• Ensure the documentation explicitly states "unilateral" paralysis; do not assume laterality.
• Distinguish from bilateral paralysis (J38.02) or paresis (J38.03, J38.04).
• Code any underlying cause of the paralysis (e.g., malignancy, surgical complication) as a secondary diagnosis.