Hemolytic transfs react, unsp incompat, unsp ac/delay, init

This code signifies an adverse immune response to a blood transfusion that results in the destruction of red blood cells, where the specific incompatibility causing the reaction is not identified. The timing of the reaction (acute or delayed) is also not specified. This represents the initial episode of care for this transfusion complication.

Use this code when a patient experiences a hemolytic transfusion reaction, but the underlying cause (e.g., ABO incompatibility, Rh incompatibility) has not been determined or documented. It is also appropriate when the medical record does not clearly state whether the reaction occurred immediately or hours/days after the transfusion. This code is for the first time the patient presents for treatment of this specific reaction.

• Ensure documentation clearly states a "hemolytic" reaction occurred, even if the specific incompatibility is unknown.
• Avoid this code if the type of incompatibility (e.g., ABO, Rh) or the timing (acute, delayed) is specified; more precise codes exist.
• Always consider an additional code for any associated signs or symptoms of the reaction.