Poisn by unsp sys anti-infect and antiparastc, slf-hrm, subs

This code describes a poisoning event resulting from the deliberate self-administration of an unknown or unspecified systemic anti-infective or antiparasitic medication. The patient is being seen for follow-up care after the initial poisoning incident.

Apply this code when documentation indicates a patient is presenting for subsequent treatment or monitoring related to an intentional self-harm poisoning by an anti-infective or antiparasitic agent, where the specific drug is not identified. This includes scenarios like ongoing management of organ damage or psychological evaluation after the acute phase.

• Ensure the encounter is clearly documented as "subsequent" and not the initial treatment for the poisoning.
• Verify that the intent is explicitly stated as "intentional self-harm" and not accidental or assault.
• Only use this code when the specific anti-infective or antiparasitic agent is not documented; otherwise, a more specific code should be chosen.