Anaphyl reaction due to advrs eff drug/med prop admin, init

This code signifies a severe, life-threatening allergic reaction (anaphylaxis) that occurs as an unintended consequence of a medication administered correctly. The drug itself, despite being given appropriately, triggered this systemic hypersensitivity response. This initial encounter indicates the first time the patient is being seen or treated for this specific event.

Apply this code when a patient experiences anaphylaxis following the proper administration of a medication, such as an antibiotic, contrast dye, or vaccine. This is appropriate when the drug was given at the correct dosage, route, and for the correct indication, but still resulted in an adverse anaphylactic reaction. It is used for the initial presentation of this event.

• Ensure documentation clearly states the reaction was anaphylactic and due to an adverse effect of a properly administered drug.
• Do not use for anaphylaxis due to drug overdose, wrong drug, or drug taken in error.
• Remember the "A" seventh character denotes the initial encounter for this specific adverse event.