Poisoning by thyroid hormones and sub, accidental, subs

This code signifies an accidental overdose or adverse reaction to thyroid hormones or their synthetic replacements, occurring during a follow-up visit for the initial poisoning event. The patient is experiencing ongoing effects or complications from an unintentional ingestion or excessive administration of these medications.

Apply this code when documenting a patient's return visit for monitoring, treatment, or management of symptoms directly related to an accidental poisoning by thyroid hormones. This includes scenarios where the patient is being evaluated for persistent hyperthyroidism, cardiac arrhythmias, or other sequelae following an unintentional overdose.

• Ensure documentation clearly indicates the poisoning was accidental and that this is not the initial encounter for the event.
• Always sequence this code after any codes for the specific manifestations or symptoms of the poisoning.
• Verify the encounter type aligns with "subsequent encounter" (e.g., follow-up, re-evaluation).