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 can only sign up for Part B during designated enrollment periods. If you donât enroll in Part B when youâre first eligible for it, you may have to pay a late enrollment penalty for as long as you have Part B coverage. Read . Signing up for Medicare on page 8.