42 CFR §424.70

1. (a)Statutory basis. This subpart implements sections 1815(c) and 1842(b)(6) of the Act, which establish limitations on who may receive payments due a provider or supplier of services or a beneficiary.
2. (b)Scope. This subpart—
   1. (1)Prohibits the assignment, reassignment, or other transfer of the right to Medicare payments except under specified conditions;
   2. (2)Sets forth the sanctions that CMS may impose on a provider or supplier that violates this prohibition, or on a supplier that violates the conditions to which it agreed in accepting assignment from the individual; and
   3. (3)Specifies the conditions for payment under court-ordered assignments or reassignments.