ABO incompatibility w hemolytic transfs react, unsp, subs

This code signifies a hemolytic transfusion reaction caused by ABO incompatibility, where the patient's immune system attacks transfused red blood cells due to mismatched ABO blood types. The reaction is unspecified in terms of the specific type of ABO incompatibility (e.g., anti-A, anti-B).

Use this code for a patient presenting for follow-up care, monitoring, or treatment of complications related to a previously diagnosed ABO incompatibility hemolytic transfusion reaction. This applies to encounters after the initial acute phase of the reaction.

• Ensure the documentation clearly states ABO incompatibility as the cause of the hemolytic transfusion reaction.
• Verify that the encounter is for a subsequent visit, not the initial acute treatment.
• If the specific ABO antibody causing the incompatibility is known, a more specific code (e.g., T80.310-T80.318-) should be used.