Abstract:
BACKGROUND:The transition from Medicaid-only to dual Medicare/Medicaid coverage has the potential to reduce financial barriers to health care for patients with serious mental illness through increased coverage or expanded access to clinicians as their reimbursement increases. AIMS:To estimate the effect of dual coverage after Medicaid enrollment during the required waiting period among adults with serious mental illness on health care use, overall and related to mental health and substance use disorders (MHSUD). METHODS:Data include enrollment and claims from Medicaid and Medicare in Missouri and South Carolina, from January 2004 to December 2007. We used an interrupted time-series design to estimate the effect of dual coverage on average use of outpatient, emergency department (ED), and inpatient care/month. RESULTS:After 12 months of dual coverage, the probability of outpatient care use increased in both states from 4% to 9%. In Missouri, the mean probability and frequency of ED visits, total and MHSUD related, increased by 21%-32%; the probability of all-cause and MHSUD-related inpatient admissions increased by 10% and 19%, respectively. In South Carolina, the mean probability of any inpatient admission increased by 27% and of any MHSUD-related inpatient admission by 42%. DISCUSSION:The increase in use of outpatient care is consistent with the expected increase in coverage of, and payment for, outpatient services under dual coverage relative to Medicaid-only. Sustained increases in ED and inpatient admissions raise questions regarding the complexity of obtaining care under 2 programs, pent-up demand among beneficiaries pretransition, and the complementarity of outpatient and inpatient service use.
journal_name
Med Carejournal_title
Medical careauthors
Burns ME,Huskamp HA,Smith JC,Madden JM,Soumerai SBdoi
10.1097/MLR.0000000000000572subject
Has Abstractpub_date
2016-09-01 00:00:00pages
868-77issue
9eissn
0025-7079issn
1537-1948journal_volume
54pub_type
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