Toxic effect of oth substances, undetermined, init encntr

This code signifies a harmful reaction to a substance not specifically categorized elsewhere, where the intent of the exposure (accidental, intentional self-harm, assault) cannot be determined. It indicates that the patient is receiving active treatment for the toxic effect.

Apply this code when a patient presents with symptoms of poisoning or adverse effects from an identified substance that doesn't have a more specific ICD-10-CM code, and the medical record does not clarify whether the exposure was accidental, intentional, or due to assault. This is appropriate for the initial visit or active phase of treatment.

• Ensure the substance causing the toxic effect is documented but does not have a more specific code.
• Only use this code when the intent of the exposure is explicitly documented as "undetermined."
• The "A" seventh character indicates the initial encounter for this condition. Subsequent care would require a different seventh character.