Toxic effect of rattlesnake venom, undetermined, sequela

This code signifies a long-term health problem or complication resulting from a rattlesnake envenomation, where the intent (accidental, intentional self-harm, assault) of the exposure is unknown. It indicates that the acute phase of the toxic effect has passed, and the patient is now experiencing residual effects.

Apply this code when documenting a patient presenting with a chronic condition, such as persistent tissue damage, neurological deficits, or organ dysfunction, that is directly attributable to a rattlesnake bite. This is used after the initial treatment for the acute envenomation has concluded, and the patient is being managed for the lasting consequences.

• Always assign a seventh character of 'S' for sequela when the patient is being treated for the residual effects of the envenomation.
• Do not use this code for the initial encounter or subsequent encounters for the acute toxic effect; those require different seventh characters.
• Code any specific sequelae (e.g., nerve damage, tissue necrosis) separately and in addition to this code, if applicable.