The present invention relates to a system and method for safely transfusing blood to a patient in a computerized healthcare environment is provided. A blood product to be administered to a patient is identified and the patient is identified. A database containing a plurality of blood compatibility test results is accessed and it is determined whether the database contains a blood compatibility test result for the identified blood product and identified patient. If so, it is determined whether the test result indicates that the identified blood product is compatible for the identified patient.