Pulmonary function testing has come into widespread use since the 1970s. This has been facilitated by several developments. Because of miniaturization and advances in computer technology, microprocessor devices have become portable and automated with fewer moving parts.
You will pay Part B premiums as long as you keep the card. Those who are not automatically enrolled in Part B can sign up during their initial Medicare enrollment period which begins three months before their 65th birthday and ends three months after the 65th birthday.
You're eligible to enroll in Medicare Part B at age 65 even if you are not eligible for Medicare Part A. 1  Sign up for Part B when first eligible to avoid a late enrollment penalty. 2  If your sponsor is on active duty, you may delay Part B enrollment without penalty. 3  Get Started with Medicare.