Toxic effect of noxious substnc eaten as food, undet, subs

This code signifies a toxic reaction resulting from the ingestion of an unspecified noxious substance, other than those explicitly categorized, where the intent (accidental, intentional self-harm, assault) cannot be determined. This particular code is used for encounters following the initial treatment of the toxic effect.

Apply this code when a patient presents for follow-up care, such as monitoring, further testing, or management of lingering symptoms, after experiencing a toxic effect from an ingested substance that is not otherwise specified and whose intent is unknown. This is appropriate when the initial acute phase of treatment has concluded.

• Always sequence this code after the primary diagnosis for the specific toxic effect or symptom being treated.
• Ensure documentation clearly states that the encounter is subsequent and that the ingested substance is not more specifically classified.
• Verify that the intent of the ingestion remains undetermined; if intent is known, a different subcategory would be appropriate.