Maryland Code, Labor and Employment § 9-310.1

(a) In any administrative action before the Commission, if it is established by a preponderance of the evidence that a person has knowingly obtained benefits under this title to which the person is not entitled, the Commission shall order the person to reimburse the insurer, self-insured employer, the Uninsured Employers' Fund, or the Subsequent Injury Fund for the amount of all benefits that the person knowingly obtained and to which the person is not entitled.

(b) An order of reimbursement required under subsection (a) of this section shall include interest on the amount ordered to be reimbursed at a rate of 1.5% per month from the date the Commission notifies the person of the amount to be reimbursed.