Poisn by unsp agents prim act on the resp sys, slf-hrm, init

This code signifies a patient presenting with an adverse reaction or toxicity due to an unknown or unspecified substance that primarily affects the respiratory system. The poisoning is explicitly determined to be self-inflicted with the intent to cause harm. This code is used for the initial phase of treatment for this specific event.

Use this code when a patient is admitted or seen in the emergency department for an intentional overdose or exposure to a respiratory-acting agent, and the specific substance involved is not yet identified. This applies to cases where the patient admits to self-harm or evidence strongly suggests an intentional act, and it's their first encounter for this particular poisoning episode.

• Ensure documentation clearly states the poisoning was intentional self-harm and the substance is unspecified but affects the respiratory system.
• Only use the "A" (initial encounter) seventh character for the period of active treatment for the poisoning.
• Do not use this code if the specific substance is known; instead, code to the specific agent.