Poisoning by antithyroid drugs, accidental, init

This code signifies an adverse health event resulting from the unintended ingestion or exposure to antithyroid medications. It specifically indicates that the patient experienced a toxic effect due to an accidental overdose or misadministration of these drugs, such as methimazole or propylthiouracil.

Apply this code when a patient presents with symptoms of poisoning directly attributable to antithyroid drugs, and the event was unintentional. This includes situations like a patient mistakenly taking too many pills, a child accidentally ingesting the medication, or an incorrect dosage being administered by a caregiver. It is used for the initial treatment encounter for this specific poisoning.

• Ensure documentation clearly states the poisoning was accidental and identifies the drug as an antithyroid agent.
• Always assign an additional code for the specific manifestation of the poisoning (e.g., cardiac arrhythmias, liver damage).
• Verify this is the patient's first encounter for this specific poisoning episode; subsequent encounters would use a different seventh character.