Hypothyroidism ICD-10 Code (E03.9) – When and How to Use It
ICD-10 Code E03.9 refers to unspecified hypothyroidism—a condition where the thyroid gland doesn’t produce enough hormones, often resulting in fatigue, cold intolerance, and weight gain. This billing guide explains how to use E03.9 properly for insurance claims, including key documentation tips for providers.