Exposure to excessive natural heat, sequela

This code signifies a long-term or residual effect resulting from a past exposure to excessive natural heat, such as from a heatwave or prolonged sun exposure. It indicates that the patient is experiencing ongoing health issues directly attributable to that prior heat exposure, rather than an acute event. The sequela could manifest as chronic kidney disease, neurological deficits, or other persistent conditions.

Apply this code when documenting a patient's current condition that is a direct, lasting consequence of a previous episode of excessive natural heat exposure. This is appropriate for follow-up visits where the acute heat-related illness has resolved, but the patient continues to suffer from its permanent or long-term complications. Do not use for acute heatstroke or heat exhaustion.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, cognitive impairment) that is being treated.
• Ensure documentation clearly links the current condition to a past exposure to excessive natural heat.
• Verify that the heat exposure was natural (e.g., environmental) and not artificial (e.g., industrial furnace).