I am a member of CALPERS. Am I exempt from medicare in addition to being exempt from SSI?

QUOTE,"I am a member of CALPERS. Am I exempt from medicare . . . "----It depends on your choice;your Medicare covers many but not all of your health care costs. In addition to Medicare's monthly premium and annual deductible, there may be co-payments, and some services are not covered at all.
To reduce your Medicare out-of-pocket costs, CalPERS Medicare health plans provide coverage that supplements your Medicare benefits. Enrolling in a Medicare health plan is not automatic. After you enroll in Medicare, you must contact CalPERS to request a change from your Basic plan to a CalPERS sponsored Medicare health plan. The effective date of enrollment will be the first of the month following the date CalPERS receives the information.
You can contact the Social Security Administration :Social Security Online - Medicare Program Info (http://www.ssa.gov/pgm/links_medicare.htm)