Toxic effect of gases, fumes and vapors, assault, sequela

This code signifies a long-term or residual health problem resulting from exposure to toxic gases, fumes, or vapors, where the exposure was intentionally inflicted by another person. These sequelae can manifest as chronic respiratory issues, neurological damage, or other persistent organ dysfunction.

Apply this code when documenting a current health condition directly attributable to a past assault involving toxic gas, fume, or vapor exposure. This is appropriate for patients presenting with chronic symptoms years after the initial incident, or when the long-term effects of such an assault are being managed.

• Always use in conjunction with an external cause code (X-code) to specify the type of gas/fume/vapor if known, and the assault circumstances.
• Ensure documentation clearly links the current condition to the past toxic exposure and specifies the assault intent.
• This "S" seventh character indicates a sequela, meaning the acute phase of the toxic effect has passed, and the patient is experiencing residual effects.