Toxic effect of lacrimogenic gas, accidental, subs

This code describes an unintentional poisoning or adverse reaction to lacrimogenic gas (e.g., tear gas) that occurred in the past and the patient is now presenting for follow-up care. The initial exposure was accidental, meaning it was not self-harm or an assault. The patient is experiencing ongoing or new symptoms related to this prior exposure.

Use this code for patients presenting for subsequent treatment of symptoms (e.g., respiratory issues, skin irritation, eye problems) resulting from an accidental exposure to tear gas. This applies when the initial acute phase of treatment has concluded, and the patient is returning for further evaluation, management, or monitoring of the toxic effects.

• Ensure the encounter is for follow-up care, not the initial acute treatment.
• Verify the exposure was accidental (unintentional) and not intentional self-harm or assault.
• Always code with an external cause code (e.g., Y38.XXXD for exposure to tear gas) to fully describe the circumstances.