Poisoning by parathyroid and parathyroid derivatives

This code signifies an adverse reaction or overdose specifically due to medications derived from or affecting the parathyroid gland. This includes substances like parathyroid hormone (PTH) preparations or related synthetic analogs, leading to toxic effects in the patient.

Apply this code when documentation clearly indicates a patient's signs and symptoms are a direct result of an overdose, accidental ingestion, or adverse effect of parathyroid-related drugs. This typically involves iatrogenic hypercalcemia or other endocrine disturbances caused by these agents.

• Always sequence this code as a secondary diagnosis, following the code for the specific manifestation of the poisoning (e.g., hypercalcemia).
• Distinguish from adverse effects of other endocrine agents; ensure the documentation specifies parathyroid-related substances.
• Verify the intent of the poisoning (accidental, intentional self-harm, assault, undetermined) using an E-code (E850-E869 for accidental, E950-E959 for self-harm, etc.).