R63: Symptoms and signs concerning food and fluid intake

R63.4: Abnormal weight loss

Abnormal weight loss, classified under the ICD-10 code R63.4, typically refers to an unexplained or unintentional decrease in body weight. While weight loss can occur due to various reasons including changes in diet, exercise, or overall health, abnormal weight loss is identified when it happens without a significant change in these areas. Often, this is a sign of underlying health issues. It can be associated with conditions like chronic disease states (such as cancer or diabetes), mental health conditions, or disorders that affect nutrient absorption. Symptomatically, individuals may present significant reduction in weight over a relatively short period, or they may continuously lose weight over a longer period without a clear cause. It can potentially affect all systems of the body, leading to fatigue, weakness, and a reduced ability to perform daily tasks.