Poisoning by thyroid hormones and sub, accidental, sequela

This code signifies a long-term or residual effect resulting from an accidental overdose or unintended exposure to thyroid hormones or their synthetic substitutes. These sequelae can manifest in various ways, such as persistent cardiac arrhythmias, bone density issues, or chronic metabolic disturbances, even after the acute poisoning has resolved.

Apply this code when documenting a patient presenting with a current condition that is a direct consequence of a past, accidental poisoning by thyroid hormones. This is appropriate for follow-up visits or admissions where the focus is on managing these lasting effects, not the acute poisoning event itself.

• Always sequence this code after the code for the specific sequela being treated (e.g., a code for osteoporosis).
• Ensure documentation clearly links the current condition to a past accidental thyroid hormone poisoning.
• Do not use this code for acute poisoning events; instead, use the appropriate acute poisoning code from the T38.1X1 category.