Heat exhaustion, anhydrotic, initial encounter

This code signifies a form of heat exhaustion characterized by a lack of sweating (anhidrosis) despite elevated body temperature due to heat exposure. Patients typically present with symptoms such as headache, nausea, weakness, dizziness, and muscle cramps, but notably without the profuse sweating seen in other forms of heat exhaustion.

Apply this code for the initial encounter of a patient diagnosed with heat exhaustion where the primary clinical feature is the absence of sweating. This often occurs in individuals with impaired sweat gland function or those taking certain medications that inhibit sweating.

• Ensure documentation explicitly states "anhydrotic" or "no sweating" in the context of heat exhaustion.
• Verify this is the patient's first presentation for this specific episode of heat exhaustion.
• Differentiate from other forms of heat exhaustion (e.g., T67.0XXA for heatstroke, T67.1XXA for heat syncope).