Acute hemolytic transfs react, unsp incompatibility, init

This code signifies a sudden and severe immune response occurring during or shortly after a blood transfusion, where the recipient's antibodies attack the transfused red blood cells. This reaction leads to the destruction of red blood cells (hemolysis) due to an unknown or unconfirmed incompatibility between the donor and recipient blood.

Use this code when a patient experiences an acute hemolytic transfusion reaction, and the specific blood incompatibility (e.g., ABO, Rh) has not yet been identified or documented. It is appropriate for the initial presentation and treatment of such a reaction.

• Ensure documentation clearly states "acute hemolytic transfusion reaction" and "unspecified incompatibility."
• Only use for the initial encounter of this specific reaction. Subsequent encounters would require a different seventh character.
• Do not use if the specific type of incompatibility (e.g., ABO, Rh) is known and documented; a more specific code would be required.