B. Use of a tolerance
Where the total charge made for an injection (i.e., for the service of the physician and/or the office nurse in providing the injection, and for the cost of the drug and supplies used) does not exceed $3, the actual charge made is determined to be a reasonable actual charge made is determined to be a reasonable charge without any further determination of the drug cost through use of e.g., the Drug Topics Red Book or the Blue Book. Thus, where the actual cost of the drug used was less than $1, use of the $3 tolerance allows room for some cushioning to offset losses due to spoilage and spillage. However, in no case may the reasonable charge exceed the actual charge made for an injection.