The deadline for filing for Medicare depends on your eligibility and specific circumstances. For most people, the initial enrollment period for Medicare begins three months before their 65th birthday and ends three months after the month of their 65th birthday. This seven-month window is the primary opportunity for individuals to enroll in Medicare. If you miss this initial enrollment period, you may have to wait for the general enrollment period, which runs from January 1 to March 31 each year. However, delaying enrollment may result in late enrollment penalties. It's important to be aware of your eligibility and the specific deadlines for enrolling in Medicare to avoid any penalties or gaps in coverage. If you have questions about your eligibility or enrollment deadlines, it's advisable to consult with a Medicare specialist or visit the official Medicare website for personalized guidance.