Toxic effect of venom of caterpillars, self-harm, subs

This code signifies a harmful reaction to caterpillar venom resulting from a deliberate act of self-poisoning. The patient is presenting for follow-up care or treatment of sequelae after the initial encounter for the intentional self-harm event.

Apply this code when documenting subsequent care for a patient who intentionally exposed themselves to caterpillar venom, such as for ongoing wound care, management of systemic symptoms, or psychological evaluation related to the self-harm attempt. This code is appropriate for any visit after the initial presentation for the acute toxic effect.

• Always use in conjunction with an external cause code (e.g., X23.0XXD for contact with caterpillars, intentional self-harm).
• Requires an additional code for the specific manifestation of the toxic effect (e.g., dermatitis, anaphylaxis).
• Distinguish carefully between accidental exposure (T63.431-) and assault (T63.433-) versus intentional self-harm.