Scombroid fish poisoning, undetermined, sequela

This code signifies the long-term or residual effects of scombroid fish poisoning where the specific circumstances of the poisoning are not known or documented. Scombroid poisoning results from consuming fish containing high levels of histamine due to improper handling, leading to an allergic-like reaction. This particular code is used when the patient presents with ongoing symptoms or complications from a past scombroid exposure of unknown origin.

Use this code for patients presenting with persistent symptoms such as chronic gastrointestinal issues, neurological deficits, or dermatological conditions that are documented as sequelae of a previously experienced scombroid fish poisoning, and the initial poisoning event's details (e.g., accidental, intentional) are not specified in the medical record. This code is appropriate for follow-up encounters addressing these long-term effects.

• Always assign an additional code for the specific sequela being treated (e.g., chronic urticaria, persistent headache).
• Ensure documentation clearly links the current condition to a past scombroid poisoning event.
• The "S" in the 7th character indicates this is a sequela code, used for complications or conditions that arise as a direct result of a previous injury or illness.