Medicare Drug Program Helped Seniors Become Healthier, Reduce Other Care Cost
Drug cost dropped as expected but health improved, too, for those who had not enjoyed drug coverage
July 26, 2011 - Among elderly Medicare beneficiaries with limited prior drug coverage, implementation of Medicare Part D
was associated with significant reductions in nondrug medical spending, such as for inpatient and skilled nursing facility care, according to
a study in the July 27 issue of the Journal of the American Medical Association (JAMA.)
When the Medicare (Part D) prescription drug benefit began in January of 2006, it has the expected results for senior
citizens of greater medication use, reduced out-of-pocket costs, and a better job of taking the drugs as prescribed.
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But, these researchers found no one had previously looked at Part Ds impact on nondrug medical spending for these
seniors.
So, J. Michael McWilliams, M.D., Ph.D., of Harvard Medical School and Brigham and Women's Hospital, Boston, and
colleagues compared nondrug medical spending for traditional Medicare beneficiaries before and after the implementation of Part D.
Nationally representative survey data and linked Medicare claims from 2004-2007 were used to compare nondrug medical
spending before and after the implementation of Part D by self-reported generosity of prescription drug coverage (extent to which medications
were mostly or completely covered) before 2006.
Participants included 6,001 elderly Medicare beneficiaries from the Health and Retirement Study, including 2,538 with
generous and 3,463 with limited drug coverage before 2006.
Adjusted total nondrug medical spending before implementation of Part D was consistently, but not significantly, higher
for participants with limited drug coverage than for participants with generous drug coverage (7.6 percent relative difference).
The researchers found that nondrug medical spending after Part D implementation was 3.9 percent lower for participants
with limited prior drug coverage than for those with generous prior drug coverage, which was a significant difference (-10.6 percent).
"This differential reduction in relative terms corresponded to an average absolute difference of -$306/quarter between
observed and expected spending for participants with limited prior drug coverage," the authors write.
This reduction was explained mostly by differential changes in spending on Part A inpatient and skilled nursing facility
institutional services (-$204/ quarter).
"Part D implementation was also associated with small differential reductions in spending on Part B physician and
ancillary services for participants with limited prior drug coverage (-$67/quarter).
These differential reductions in spending on Part B services were not associated with differential changes in outpatient
visits (-0.06 visits/quarter) and were thus likely attributable to reduced use of inpatient rather than outpatient physician services."
The researchers add that nondrug medical spending in the control group did not differentially change after January 1,
2004, for beneficiaries with limited prior drug coverage in 2002 ($14/quarter), relative to beneficiaries with generous prior coverage.
"In concert with previous studies, these findings suggest that increased medication use and adherence achieved through
expanded drug coverage for seniors have been associated with decreased spending for non-drug medical care," the authors write.
"The economic and clinical benefits suggested by these reductions may be enhanced by further expansions in prescription
drug coverage for seniors, improvements in benefit designs for drug-sensitive conditions, and policies that integrate Medicare payment and
delivery systems across drug and nondrug services."
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