Poisoning by thyroid and thyroid derivatives

This code signifies an adverse reaction or overdose resulting from the ingestion or exposure to thyroid hormones or their synthetic derivatives. It encompasses both accidental and intentional poisonings by medications such as levothyroxine, liothyronine, or desiccated thyroid. The clinical presentation can range from mild symptoms like tremors and palpitations to severe thyrotoxicosis, cardiac arrhythmias, and coma.

Apply this code when documentation clearly indicates a patient's condition is due to an overdose or toxic effect of thyroid medications. This includes scenarios where a patient mistakenly takes too much thyroid hormone, or in cases of intentional self-poisoning. Supporting documentation should detail the substance involved, the circumstances of the poisoning, and the resulting clinical manifestations.

• Always sequence this code as a primary diagnosis when it is the reason for the encounter.
• Do not use this code for adverse effects of correctly prescribed and administered thyroid medications; instead, refer to codes for adverse effects of drugs.
• Ensure documentation specifies "poisoning" or "overdose" rather than just "adverse effect" to justify this code.