Ciguatera fish poisoning, undetermined, sequela

This code signifies the long-term or residual effects stemming from ciguatera fish poisoning, where the initial intent (accidental, intentional, or assault) of the poisoning is not documented or cannot be determined. These sequelae can manifest as persistent neurological, gastrointestinal, or cardiovascular symptoms long after the acute phase of the illness has resolved.

Apply this code when a patient presents with chronic or lasting health problems directly attributable to a past ciguatera fish poisoning event, and the circumstances surrounding the original exposure are unknown or unspecified. This is appropriate for follow-up encounters addressing these ongoing complications, rather than the initial acute poisoning.

• Always sequence this sequela code after the code for the specific manifestation of the sequela (e.g., chronic neuropathy, persistent diarrhea).
• Ensure documentation clearly links the current condition to a prior ciguatera fish poisoning.
• The "S" seventh character indicates a sequela, meaning it's used for complications or conditions arising as a direct result of a previous injury or illness.