Heat exhaustion, unspecified, initial encounter

This code signifies a mild form of heat-related illness characterized by symptoms such as heavy sweating, fatigue, dizziness, and nausea, without significant central nervous system dysfunction or organ damage. It occurs when the body overheats due to prolonged exposure to high temperatures and inadequate fluid intake.

Use this code for patients presenting with initial symptoms of heat exhaustion, such as profuse sweating, weakness, headache, and muscle cramps, who are seeking medical attention for the first time for this specific episode. This diagnosis is appropriate when the patient's core body temperature is elevated but typically below 104°F (40°C).

• Ensure documentation clearly distinguishes heat exhaustion from more severe heatstroke.
• Confirm this is the patient's first encounter for this specific episode of heat exhaustion.
• Look for associated symptoms like dehydration or electrolyte imbalance, which may require additional codes.