Toxic effect of rattlesnake venom, undetermined, init encntr

This code signifies the adverse systemic effects resulting from exposure to rattlesnake venom when the intent (accidental, intentional self-harm, assault) is not documented or cannot be determined. It covers the initial presentation and treatment of a patient experiencing symptoms such as swelling, pain, nausea, or coagulopathy due to rattlesnake envenomation.

Apply this code for a patient presenting to an emergency department or clinic with signs and symptoms of rattlesnake envenomation where the circumstances surrounding the bite are unclear or unrecorded. This is appropriate for the initial visit for treatment, such as antivenom administration or wound care.

• Ensure documentation clearly states "rattlesnake" as the source of the venom.
• Only use the "A" (initial encounter) seventh character for the first time the patient is seen for this specific injury.
• Do not use if the intent of the venom exposure (e.g., accidental, assault) is clearly documented; use the appropriate intent code instead.