Toxic effect of unspecified substance, assault, sequela

This code signifies a long-term health problem or complication arising from a past toxic exposure to an unknown substance, where the exposure was intentionally inflicted by another person. It indicates that the acute phase of the toxic effect has resolved, but residual effects persist.

Use this code when documenting a chronic condition, disability, or other sequela directly attributable to a prior assault involving an unspecified toxic agent. This applies when the original toxic exposure event is no longer active, but its lasting impact is being treated or evaluated.

• Only assign this code for the sequela of the toxic effect, not the acute event itself.
• Ensure documentation clearly links the current condition to a past toxic assault.
• If the specific toxic substance is known, a more precise code from T36-T50 should be used with an appropriate seventh character.