When a physician orders a transfusion, it's usually nurses that administer it. Nurses insert the IV catheter, set up the transfusion per protocol, and monitor the patient's condition.
So what this MD does is "consult" with another physician and get them to write the order. It's a win-win situation for both physicians, because a consultation and a request for a consultation both involve a fee, either charged to the patient, the patient's insurance or the public purse in the case of individuals who are enrolled in government run subsidized medicine.
I have to wonder if he's got one or a couple of colleagues involved in this little extra side-business. He still would have to identify that the patient has a need for a transfusion, depending on the hospital's criteria for recommending a transfusion to a patient.