Using data from the 1998 Medicare Current Beneficiary Survey (MCBS), we exa
mine changes in beneficiaries' prescription drug coverage from 1997 to 1998
and compare drug use and spending data for beneficiaries with and without
drug coverage. The data show that in 1998 the aggregate prescription drug c
overage rate of Medicare beneficiaries may have reached a plateau, Also, pr
escription drug use declined for beneficiaries without drug coverage and in
creased for those with drug coverage. Covered beneficiaries also paid a lar
ger percentage of their total drug costs out of pocket in 1998 than in 1997
The result was a widening of use and spending differences between benefici
aries with and without coverage.