Poisoning by posterior pituitary hormones

This code signifies an adverse reaction or toxic effect resulting from the ingestion, administration, or exposure to hormones produced by the posterior pituitary gland. This typically involves conditions arising from an overdose or inappropriate use of medications like vasopressin or oxytocin.

Apply this code when documentation clearly indicates a patient's signs and symptoms are directly attributable to an overdose or poisoning by posterior pituitary hormones. This includes accidental ingestions, intentional overdoses, or adverse drug events where the hormone is the causative agent. Supporting documentation should detail the substance involved and the resulting clinical presentation.

• Always sequence this code as a primary diagnosis when it is the reason for the encounter.
• Do not confuse with adverse effects of therapeutic use (E-codes) if the intent was therapeutic and the reaction was an expected side effect.
• Ensure documentation specifies the posterior pituitary hormone involved if known, and consider an E-code for the external cause of poisoning.