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 have eight months after that to sign up for Medicare. As is the case for people who sign up for Medicare at 65, you generally enroll in Part A (primarily for hospitals and other inpatient treatment) and Part B (doctors, outpatient treatment, and medical equipment).