Poisoning by oth vaccines and biolg substances, acc, init

This code signifies an adverse reaction or toxicity resulting from the accidental administration or exposure to a vaccine or other biological substance. It indicates that the poisoning was unintentional and represents the initial phase of treatment for this event.

Apply this code when a patient presents with symptoms of poisoning due to an accidental overdose, incorrect vaccine type, or an unexpected adverse effect from a biological substance, such as a blood product or antitoxin. This is used for the initial encounter where the poisoning is being evaluated and treated.

• Always assign an additional code for the specific vaccine or biological substance involved (e.g., T50.B1XA for influenza vaccine).
• Consider external cause codes (V00-Y99) to describe the circumstances of the accidental poisoning.
• Distinguish from adverse effects in therapeutic use (T36-T50 with 5th or 6th character 5) or intentional self-harm (X60-X69).