Toxic effect of ingested mushrooms, undetermined, subs

This code signifies a toxic reaction to ingested mushrooms where the specific type of mushroom is unknown, and the patient is receiving follow-up care for this condition. It indicates that the initial poisoning event has already been addressed, and the current encounter is for ongoing management or monitoring of the toxic effects.

Apply this code for patients presenting for follow-up appointments related to mushroom poisoning when the specific mushroom species could not be identified. This includes scenarios such as monitoring liver function, neurological symptoms, or gastrointestinal distress after initial treatment for an undetermined mushroom ingestion.

• Ensure documentation clearly states "undetermined" mushroom type and "subsequent encounter."
• Do not use this code for the initial encounter or for confirmed mushroom types.
• Always sequence this code after any codes for specific symptoms or complications of the poisoning.