Poisoning by other and unspecified vaccines and biological substances

This code signifies an adverse reaction or toxic effect resulting from the administration of a vaccine or other biological substance not specifically classified elsewhere. It indicates a harmful response to a biological agent, such as a serum, antitoxin, or other immunological product, when given in therapeutic or prophylactic doses.

Apply this code when documentation clearly states a patient experienced poisoning or an adverse effect from a vaccine or biological substance that is not specified by a more precise ICD-9-CM code. This includes situations where the specific type of vaccine or biological substance causing the reaction is not detailed, or it falls into an "other specified" category. Supporting documentation should describe the substance and the resulting adverse event.

• Always sequence this code after the appropriate E-code identifying the specific vaccine or biological substance responsible for the poisoning.
• Distinguish between a true poisoning (toxic effect) and an allergic reaction (e.g., anaphylaxis), which would be coded differently.
• Ensure the documentation specifies that the reaction is due to the substance itself and not an error in administration or a contaminated product, which would lead to different E-codes.