Poisn by analeptics and opioid receptor antag, undet, init

This code signifies a poisoning event involving analeptic agents (stimulants) or opioid receptor antagonists (e.g., naloxone, naltrexone) where the intent of the poisoning is unknown or cannot be determined. The patient is in the initial phase of receiving active treatment for the poisoning.

This code is appropriate when a patient presents with signs and symptoms of poisoning from analeptics or opioid antagonists, and the medical record does not clearly indicate whether the exposure was accidental, intentional self-harm, or assault. It is used for the initial encounter when the patient is actively being managed for the toxic effects.

• Always assign an external cause code (V00-Y99) to provide more detail about the circumstances of the poisoning.
• Do not use this code if the intent (accidental, intentional self-harm, assault) is documented; instead, select the appropriate intent-specific code.
• Ensure the "A" seventh character for "initial encounter" is used only for the period when the patient is receiving active treatment for the condition.