Poisoning by mixed bact vaccines w/o a pertuss, undet, init

This code signifies an adverse reaction or poisoning resulting from a mixed bacterial vaccine that specifically excludes a pertussis component. The intent behind the exposure is unknown or cannot be determined, and this code is used for the initial phase of treatment for this event.

This code is appropriate when a patient presents with symptoms of poisoning or an adverse effect following the administration of a vaccine such as Diphtheria and Tetanus (DT) or Tetanus Toxoid (TT), where the intent (accidental, intentional self-harm, assault) is not documented. It is used for the first encounter related to the management of this specific poisoning event.

• Requires an additional code for the specific adverse effect or manifestation of the poisoning.
• Do not use for adverse reactions to vaccines containing a pertussis component (e.g., DTaP, Tdap).
• The 7th character "A" indicates an initial encounter for active treatment of the poisoning.