Poisn by pertuss vaccn, inc combin w pertuss, slf-hrm, init

This diagnosis code indicates a poisoning event resulting from the intentional self-administration of a pertussis-containing vaccine, or a vaccine combination that includes a pertussis component. This is not an adverse reaction to a properly administered vaccine, but rather a deliberate act of self-harm involving the vaccine substance itself. The "initial encounter" signifies that the patient is currently receiving active treatment for the poisoning.

Use this code when a patient presents with symptoms of poisoning directly attributable to the deliberate, self-inflicted ingestion, injection, or other route of exposure to a pertussis vaccine. This applies to situations where the intent was to cause harm to oneself, and the patient is in the acute phase of treatment.

• Always verify the intent of self-harm through documentation; accidental poisoning would be coded differently.
• Ensure the documentation clearly specifies a pertussis vaccine or a combination vaccine containing pertussis as the substance involved.
• Confirm the "initial encounter" status, meaning the patient is still receiving active treatment for the poisoning. Subsequent encounters for follow-up would use a different encounter character.