Poisoning by diagnostic agents, accidental, subs

This code signifies a patient's adverse reaction or injury resulting from an accidental overdose or improper administration of a substance primarily used for diagnostic purposes. This includes situations where a diagnostic agent, such as a contrast medium or a radiopharmaceutical, was unintentionally given in an incorrect dose or to the wrong patient, leading to a harmful effect. The "subsequent encounter" indicates that the patient is receiving follow-up care for this poisoning event.

Apply this code when a patient presents for ongoing management of symptoms or complications arising from an accidental poisoning by a diagnostic agent. This could include follow-up appointments for kidney function monitoring after an accidental contrast overdose, or continued treatment for an allergic reaction to a diagnostic dye. It is used after the initial acute phase of treatment.

• Ensure documentation clearly states the poisoning was accidental and identifies the substance as a diagnostic agent.
• Confirm the encounter type is for follow-up care related to the poisoning, not the initial treatment.
• Always sequence this code after any codes for the specific manifestations or complications of the poisoning.