(b) If a physician's bill, or a request for payment for a physician's services, includes a charge for a laboratory test for which payment may be made under this part, the amount payable with respect to the test shall be determined as follows:
(1) If the bill or request for payment indicates that the test was personally performed or supervised by the physician who submitted the bill (or for whose services the request for payment was made) or by another physician with whom that physician shares his or her practice, the payment will be based on the physician's usual and customary charge for the test or the rates of payment which the State uses for purchasing such services, whichever is the lesser amount.
(2) If the bill or request for payment indicates that the test was performed by an independent laboratory, the amount of reimbursement will not exceed the billed cost of the independent laboratory or the rate of payment which the State uses for purchasing such services, whichever is the lesser amount. A nominal payment may be made to the physician for collecting, handling and shipping a specimen to the laboratory if the physician bills for such a service. The total reimbursement may not exceed the rate of payment which the State uses for purchasing such services.