Should a medical review officer (MRO) report a negative-dilute test result in the Clearinghouse?

Guidance:  No. The only negative test result reported to the Clearinghouse is a negative return-to-duty (RTD) result, which is reported by the employer or C/TPA in accordance with 382.705(b)(1)(ii) or (b)(6). If the employer receives a negative-dilute RTD result from the MRO, the employer or C/TPA would report it to the Clearinghouse as a negative RTD result.