Poisoning by antidotes and chelating agents, undet, init

This code signifies an adverse event resulting from the ingestion or exposure to antidotes or chelating agents, where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is in the initial phase of treatment for the poisoning.

Apply this code when a patient presents with symptoms of poisoning specifically due to an antidote or chelating agent, and the medical record does not clearly state whether the exposure was accidental, intentional, or due to assault. This is for the first time the patient is receiving care for this specific poisoning event.

• Always sequence this code first if it is the primary reason for the encounter.
• Requires an additional code to specify the specific antidote or chelating agent involved, if known.
• Ensure documentation supports "undetermined" intent; otherwise, a more specific intent code should be used.