Poisoning by typhoid and paratyphoid vaccine

This code signifies an adverse reaction or toxic effect resulting from the administration of a typhoid or paratyphoid vaccine. It indicates that the patient has experienced poisoning due to the vaccine itself, rather than an allergic reaction or other complication.

Apply this code when documentation clearly states "poisoning by" or "toxic effect of" a typhoid or paratyphoid vaccine. This typically occurs in cases of overdose, incorrect administration, or an idiosyncratic toxic response to the vaccine components. Supporting documentation should detail the vaccine administered and the resulting toxic symptoms.

• Always sequence this code as the primary diagnosis when it is the reason for the encounter.
• Do not confuse this with allergic reactions to vaccines (e.g., 995.20-995.29), which are distinct adverse events.
• Ensure documentation specifies "poisoning" or "toxic effect" rather than a general adverse effect or complication.