Non-ABO incompat w delayed hemolytic transfs react, subs

This code signifies a delayed adverse immune response to a blood transfusion that is not related to the ABO blood group system. The patient's immune system has developed antibodies to non-ABO antigens present in the transfused blood, leading to the destruction of red blood cells days to weeks after the transfusion. This specific code indicates that the patient is being seen for follow-up care or management of this previously diagnosed reaction.

Use this code when a patient presents for ongoing treatment, monitoring, or evaluation of a delayed hemolytic transfusion reaction caused by non-ABO incompatibility. This would include scenarios such as follow-up appointments to check hemoglobin levels, manage symptoms like jaundice or fever, or address complications arising from the initial reaction. It is appropriate for any encounter subsequent to the initial diagnosis and treatment.

• Ensure documentation clearly states "delayed" and "non-ABO incompatibility" for accurate code assignment.
• Verify that the encounter is for follow-up or ongoing management, not the initial diagnosis or acute treatment.
• Always sequence this code after the primary reason for the encounter if the reaction is a co-morbidity or complication being managed.