How To Stop Medicare Part B? 
You can opt out of Part B by sending a letter to Social security asking that your Part B coverage be cancelled . I hope you have carefully weighed that decision because in order for you to have DRUG coverage yuo have to have Part A AND Part B . If you do not have Part B you can not have any coverage for Outpatient Services - doctors , lab , xrays , etc - unless you have VA coverage and then what happens if you need treatment at a non-VA facility . You need to weigh this question very thoroughly because yuou could be cutting your own throat 