Lien.
(a)Except as limited by subsections (b) and (c) of this…#
(a) Except as limited by subsections (b) and (c) of this section, the District shall have a lien, perfected in accordance with subsection (d) of this section, upon any judgment or settlement awarded or executed in favor of a beneficiary against a third party for that amount of the judgment or settlement that represents the care and treatment it has undertaken to provide or pay for as health-care assistance.