Toxic effect of lacrimogenic gas, assault, subs encntr

This code signifies a harmful reaction to tear gas, such as riot control agents, when the exposure was intentionally inflicted by another person. The "subsequent encounter" indicates that the patient is receiving follow-up care for the initial injury or complication arising from this toxic exposure. Symptoms can range from severe eye and respiratory irritation to skin burns and systemic effects.

Use this code for patients presenting for ongoing treatment, monitoring, or management of complications following an assault involving lacrimogenic gas. This includes follow-up appointments for persistent respiratory issues, eye damage, skin lesions, or psychological distress directly attributable to the initial toxic exposure. It should not be used for the initial acute presentation.

• Ensure documentation clearly states the toxic effect is due to lacrimogenic gas and was an assault.
• Confirm the encounter is for follow-up care, not the initial treatment, to justify the "D" seventh character.
• Always code any specific symptoms or conditions resulting from the toxic effect, such as chemical conjunctivitis or bronchitis, in addition to this code.