Prior to the enactment of P.L. 96-499, the Omnibus Reconciliation Act of 1980, a physician
who prepared an antigen for a patient could not be reimbursed for that service unless
the physician also administered the antigen to the patient. Effective January 1, 1981,
payment may be made for a reasonable supply of antigens that have been prepared for
a particular patient even though they have not been administered to the patient by
the same physician who prepared them if: (1) the antigens are prepared by a physician
who is a doctor of medicine or osteopathy, and (2) the physician who prepared the
antigens has examined the patient and has determined a plan of treatment and a dosage
regimen.