Toxic effect of inorganic substances, undetermined, sequela

This code indicates a long-term health problem or residual condition resulting from exposure to a specific inorganic substance, where the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined. It signifies that the acute toxic event has passed, but its lasting effects are still present.

Apply this code when documenting chronic conditions or permanent damage (e.g., organ damage, neurological deficits) that are directly attributable to a past toxic exposure to an inorganic substance not otherwise specified. This is used when the medical record clearly states the sequela but lacks information regarding the circumstances of the original poisoning.

• Always sequence this code after the code(s) for the specific sequela being treated (e.g., chronic kidney disease, peripheral neuropathy).
• Ensure the medical record explicitly links the current condition to a past toxic exposure to an inorganic substance.
• Only use the "S" (sequela) seventh character for conditions that are residual effects of a past acute toxic event.