In any matter where medical services rendered to a client form any part of the basis of a legal claim for damages or workmen's compensation, a physician shall not contract for, charge, or collect a fee in excess of the following limits:
a. The physician's standard fee for the same medical services which do not form any part of the basis of a legal claim for damages or workmen's compensation; plus
b. The standard or established incremental costs, clerical or otherwise, incurred in rendering medical services which form any part of the basis of a legal claim for damages or workmen's compensation.