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.
If you are not yet receiving retirement benefits, and close to turning 65, you will need to enroll in Medicare Part A and/or Medicare Part B during your Initial Enrollment Period (IEP), which begins three months before you turn 65 and lasts seven months.