Toxic effect of venom of black widow spider, undet, subs

This code signifies a toxic reaction resulting from a black widow spider bite, where the intent (e.g., accidental, intentional self-harm) of the exposure cannot be determined. The "D" seventh character indicates that this is a subsequent encounter, meaning the patient is receiving follow-up care for the initial poisoning.

Apply this code when a patient presents for ongoing management, monitoring, or treatment of symptoms related to a black widow spider envenomation, and the circumstances surrounding the bite are not clearly documented as accidental or intentional. This is appropriate for follow-up visits after the initial acute care has been rendered.

• Ensure documentation clearly supports a "subsequent encounter" for the black widow spider envenomation.
• Only use this code when the intent of the exposure is explicitly documented as "undetermined."
• Do not use this code for initial encounters; refer to the appropriate "A" seventh character for initial treatment.