Hemorrhage and infarction of thyroid

This code represents acute vascular events affecting the thyroid gland, specifically bleeding within the thyroid tissue (hemorrhage) or tissue death due to interrupted blood supply (infarction). These conditions can lead to sudden thyroid dysfunction or pain.

Apply this code when documentation clearly indicates a diagnosis of thyroid hemorrhage or infarction, often presenting with acute neck pain, swelling, or rapid changes in thyroid hormone levels. Supporting documentation typically includes imaging reports (e.g., ultrasound, CT) demonstrating the vascular event and clinical notes detailing the acute presentation.

• Differentiate from other causes of acute thyroid pain or swelling, such as thyroiditis or abscess.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter.
• Ensure the documentation specifies "hemorrhage" or "infarction" of the thyroid, not just a general thyroid abnormality.