Toxic effect of oth substances, assault, init encntr

This code signifies a patient presenting with adverse health effects resulting from intentional harm by another person using a specific toxic substance not otherwise classified. The "initial encounter" designation indicates the patient is receiving active treatment for the acute effects of this poisoning.

Apply this code when documenting a patient's first visit for symptoms directly attributable to a toxic substance administered or exposed by another individual with intent to cause harm. Examples include poisoning attempts with unknown chemicals, industrial solvents, or other specified substances in an assault context.

• Always sequence this code first when it represents the primary reason for the encounter.
• Requires an external cause code (e.g., Y09.-) to fully describe the circumstances of the assault.
• Ensure the substance is "specified" but not covered by more specific T codes (e.g., T40 for opioids).