D.C.’s mental health agency has failed to recover more than $30 million in denied Medicaid claims that have piled up over several years, maintains unreliable technology systems and software and may have violated local and federal spending laws, a new audit finds.

Of the roughly 1.4 million Medicaid claims submitted by the Department of Mental Health between 2002 and 2006, as many as 500,000 were rejected, the Office of the Inspector General found in an audit released Thursday. But a process for reworking and resubmitting those claims, which the D.C. government can do up to two years after their initial denial, is “nonexistent,” the IG found.