Heat fatigue, transient, sequela

This code signifies the long-term or late effects of a past episode of heat fatigue that was transient in nature. It indicates that a patient is experiencing residual symptoms or conditions directly attributable to a previous, non-severe heat-related illness. This is distinct from an acute or current episode of heat fatigue.

Use this code when documenting a patient presenting with ongoing issues, such as chronic weakness, persistent dizziness, or other lasting sequelae, that are clearly linked to a prior, resolved incident of heat exhaustion or heat syncope. This applies when the original heat-related event is no longer active but has left a permanent or long-standing impact.

• Always assign an additional code to specify the exact nature of the sequela (e.g., chronic fatigue, neurological deficits).
• Ensure documentation clearly establishes the causal link between the past heat fatigue and the current residual condition.
• Do not use this code for acute or current presentations of heat fatigue; those require codes from the initial injury/illness category.