The United States has intervened in six complaints alleging that members of the Kaiser Permanente consortium violated the False Claims Act by submitting inaccurate diagnosis codes for its Medicare Advantage Plan enrollees in order to receive higher reimbursements. The Kaiser Permanente consortium members (collectively Kaiser) are Kaiser Foundation Health Plan Inc., Kaiser Foundation Health Plan of Colorado, The Permanente Medical Group Inc., Southern California Permanente Medical Group Inc. and Colorado Permanente Medical Group P.C. Kaiser is headquartered in Oakland, California. In order to increase its Medicare reimbursements, Kaiser allegedly pressured its physicians to create addenda to medical records after the patient encounter, often months or over a year later, to add risk-adjusting diagnoses that patients did not actually have and/or were not actually considered or addressed during the encounter, in violation of Medicare requirements.