You can profit from pathology services when the lab charges you one rate for its services, then you bill a patient's insurer a higher reimbursement rate. Here's an example: You send a patient sample to an outside lab for testing. The lab charges you a discounted price - say, $50 to examine a biopsy. The patient's insurer then reimburses you for a much higher amount, say $100. The difference, $50, is pure profit. Be aware, however, that authorities and insurers are scrutinizing such arrangements, which were investigated in a front-page story in the Sept. 30 Wall Street Journal.