Poisn by oth prim systemic and hematolog agents, undet, subs

This code signifies a poisoning event involving a systemic or hematological agent not classified elsewhere, where the intent (accidental, intentional self-harm, assault) cannot be determined. It is used when the patient is receiving follow-up care for the sequelae or complications of the initial poisoning.

This code is appropriate for subsequent visits related to the ongoing management of symptoms, monitoring of organ function, or treatment of long-term effects stemming from an undetermined poisoning by a systemic or hematological agent. Examples include follow-up for persistent anemia after exposure to an unknown toxin or ongoing neurological deficits post-ingestion of an unidentified systemic agent.

• Always assign an additional code for the specific manifestation of the poisoning, if known.
• Ensure the "undetermined" intent is clearly documented in the medical record.
• Verify that the encounter is for follow-up care, not the initial treatment of the acute poisoning.