Heat exhaustion, anhydrotic

This code signifies a severe form of heat exhaustion characterized by the absence of sweating (anhidrosis). It results from prolonged exposure to high temperatures, leading to significant fluid and electrolyte depletion without the body's normal cooling mechanism. Patients typically present with elevated body temperature, mental status changes, and a dry, hot skin.

Use this code when documentation clearly indicates heat exhaustion accompanied by anhidrosis. This often occurs in individuals with impaired thermoregulation or those performing strenuous activity in hot environments without adequate hydration. Supporting documentation should specify the lack of sweating despite heat exposure and other symptoms consistent with severe heat exhaustion.

• Differentiate from other forms of heat exhaustion (e.g., heat exhaustion due to salt depletion) which involve sweating.
• Ensure documentation explicitly states "anhydrotic" or describes the absence of sweating.
• Consider sequencing with codes for dehydration or electrolyte imbalances if also documented.