If you canceled or disenrolled from your Part B coverage, you may be able to get reinstated. However, you might have to pay a late enrollment penalty to re-enroll unless you had group health insurance during the period when you did not have Part B.
“To re-enroll, you have to visit the Social Security office website, complete the application, and send the required documents to complete the process. If you left Part B coverage to enroll in an employer-issued plan, you may have to prove coverage in order to avoid paying late enrollment fees,” says Parker.