Heat syncope

This code represents a transient loss of consciousness due to peripheral vasodilation and pooling of blood in the extremities, often occurring in hot environments. It is a mild form of heat illness characterized by fainting or near-fainting episodes without significant core body temperature elevation.

Use this code for patients presenting with a sudden, brief loss of consciousness or feeling faint after exposure to heat, especially when standing for prolonged periods. Documentation should clearly indicate a syncopal episode directly attributable to heat exposure, without evidence of other causes for syncope or more severe heat-related illness.

• Differentiate from other causes of syncope; ensure documentation explicitly links the event to heat.
• Do not use if the patient exhibits signs of heat stroke (e.g., altered mental status, high core body temperature).
• Consider additional codes for any associated symptoms or underlying conditions contributing to susceptibility.