Poisn by pertuss vaccine, inc combin w pertuss, undet, sqla

This code signifies a long-term or residual effect stemming from a poisoning event involving a pertussis-containing vaccine. The original poisoning's nature (accidental, intentional, etc.) is undetermined, and the code specifically points to the lasting health consequences rather than the acute event itself.

Apply this code when documenting a patient's current condition that is a direct, ongoing sequela of a past pertussis vaccine poisoning, where the intent of the poisoning is not known. This would be used after the acute phase of the poisoning has resolved, and the patient is being treated for chronic issues attributed to that event.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past pertussis vaccine poisoning.
• Do not use this code for acute poisoning events; it is specifically for sequelae.