Toxic effect of contact w unsp venom animal, undet, sequela

This code describes a delayed or residual health problem resulting from exposure to an unidentified venomous animal, where the intent of the exposure (accidental, intentional self-harm, assault) cannot be determined. It signifies that the acute phase of the toxic effect has passed, and the patient is now experiencing a long-term consequence.

Apply this code when documenting a chronic or late-developing symptom, condition, or complication directly attributable to a venomous animal encounter, and the specific animal or circumstances surrounding the exposure are unknown. This is appropriate for follow-up encounters addressing persistent issues after the initial toxic event has resolved.

• Requires a seventh character "S" for sequela, indicating a late effect.
• Only use when the specific venomous animal is not identified and the intent is undetermined.
• Always code the specific sequela (e.g., dermatitis, neuropathy) first, followed by this code as a secondary diagnosis.