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.
Three months after the month you enroll. Once your Initial Enrollment Period has passed, your next chance to sign up for Medicare Part A and Part B is the General Enrollment Period that occurs every year from January 1 to March 31. If you use this period to enroll, your Medicare coverage won't start until July 1.