Poisoning by diphtheria vaccine

This code signifies an adverse reaction or toxic effect resulting from the administration of a diphtheria vaccine. It encompasses systemic or localized symptoms arising directly from the vaccine itself, rather than from improper administration technique.

Use this code when documentation clearly indicates a patient experienced poisoning or a toxic reaction specifically attributed to a diphtheria vaccine. This typically involves symptoms beyond expected mild side effects, such as severe allergic reactions, neurological complications, or other systemic toxicities.

• Always sequence this code as the primary diagnosis when it is the reason for the encounter.
• Do not confuse this with codes for adverse effects of therapeutic use of vaccines (E-codes), which describe the intent of the drug. This code describes the outcome of poisoning.
• Ensure documentation specifies "diphtheria vaccine" and describes symptoms consistent with poisoning, not just a routine adverse effect.