Toxic effect of rattlesnake venom, accidental, init

This code signifies an adverse health effect resulting from an unintentional exposure to rattlesnake venom. It specifically captures the initial presentation and treatment of the systemic or localized toxic effects following such an envenomation.

Apply this code for patients presenting to an emergency department or physician's office with symptoms of rattlesnake envenomation, such as swelling, pain, ecchymosis, or systemic reactions like nausea, vomiting, or hypotension, when the exposure was accidental. This code is appropriate for the first encounter for this specific injury.

• Always assign an external cause code (e.g., W59.21XA) to specify the bite itself and the circumstances.
• Do not use this code for intentional self-harm or assault; refer to the appropriate T63.01- category for those scenarios.
• Ensure documentation clearly states "accidental" or "unintentional" and that this is the initial encounter for treatment.