ABO incompat react due to tranfs of bld/bld prod, unsp, subs

This code signifies an adverse immune response occurring in a patient who received a blood transfusion, where the donor and recipient blood types (ABO system) were incompatible. The reaction is unspecified in its exact nature, and this particular code indicates that the patient is receiving follow-up care for this previously diagnosed condition.

This code is appropriate for encounters where a patient is being treated for ongoing symptoms, complications, or monitoring related to a previously documented ABO incompatibility transfusion reaction. It would be used for subsequent hospitalizations, outpatient visits, or consultations following the initial acute event.

• Ensure documentation clearly indicates the encounter is for follow-up care of a previously diagnosed ABO incompatibility reaction.
• Do not use this code for the initial acute presentation of the reaction; a code without the "D" (subsequent encounter) seventh character would be more appropriate for the initial encounter.
• Look for specific details in the medical record regarding the type of reaction (e.g., hemolytic) to determine if a more specific code within the T80.3 category can be assigned.