Malignant neoplasm of larynx, unspecified

This code signifies a cancerous growth originating in the larynx, also known as the voice box, when the specific subsite within the larynx (e.g., glottis, supraglottis, subglottis) has not been documented or determined. It indicates a primary malignant tumor affecting the structure responsible for voice production.

This code is appropriate when the medical record confirms a diagnosis of laryngeal cancer, but the physician's documentation does not specify the exact anatomical location within the larynx. It is used when pathology reports confirm malignancy but lack further site detail, or when initial diagnostic workup is incomplete regarding subsite.

• Avoid using this code if a more specific laryngeal subsite (e.g., glottis, supraglottis) is documented; always code to the highest level of specificity.
• Ensure documentation clearly states "larynx" and "malignant neoplasm" without further site detail to support this unspecified code.
• Sequence this code as the primary diagnosis when the laryngeal malignancy is the reason for the encounter, unless treatment is directed at a secondary site.