Abnormal weight loss

This code signifies an unintentional and clinically significant reduction in body weight that is considered outside the normal physiological range. It indicates a decline in body mass that is not attributed to deliberate dietary changes or increased physical activity. This finding often serves as a red flag for underlying medical conditions.

Apply this code when documentation explicitly states "abnormal weight loss," "unexplained weight loss," or "unintentional weight loss" without a more specific underlying cause identified at the time of coding. It is appropriate when the provider has not yet determined the etiology of the weight loss but recognizes its clinical significance.

• Do not use this code if a more specific diagnosis explaining the weight loss (e.g., malignancy, hyperthyroidism, malabsorption) is documented.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is related to investigating the cause of the weight loss.
• Ensure the documentation clearly indicates the weight loss is abnormal or unexplained, rather than a desired outcome of treatment.