Toxic effect of substances, accidental (unintentional), init

This code signifies a patient presenting with adverse health effects resulting from an accidental exposure to a substance not specifically classified elsewhere in the ICD-10-CM code set. The exposure was unintentional, meaning the patient did not intend to ingest, inhale, or otherwise come into contact with the harmful substance. This is the initial encounter for this specific toxic event.

Apply this code when a patient experiences an acute toxic reaction due to an accidental exposure to a substance like a cleaning product, an industrial chemical, or an unknown environmental toxin, where a more specific code for that substance's toxic effect is unavailable. This code is appropriate for the initial visit where the toxic effect is being evaluated and treated.

• Always sequence this code first if it is the primary reason for the encounter.
• Utilize an additional code from T36-T50 to identify the specific substance if known and applicable.
• Ensure the documentation clearly states the exposure was accidental and this is the initial presentation for the toxic effect.