Adult failure to thrive

This code represents a syndrome of progressive functional decline in older adults, characterized by weight loss, decreased appetite, malnutrition, dehydration, and impaired physical and cognitive function. It signifies a general decline in health and overall well-being, often without a specific underlying acute illness.

Use this code when documentation indicates a comprehensive decline in an adult patient's physical and/or mental state, leading to significant functional impairment and often weight loss. This diagnosis is typically applied after ruling out specific treatable medical conditions that could explain the symptoms. Documentation should support a chronic, progressive decline rather than an acute illness.

• Do not use for pediatric patients; this code is specifically for adults.
• Always sequence this code after any definitive underlying medical conditions contributing to the decline, if known.
• Ensure documentation clearly differentiates "failure to thrive" from malnutrition (263.9) or cachexia (799.4), though these may coexist.