The 6 month rule for Medicare refers to your one-time, six-month Medigap Open Enrollment Period, a crucial window to buy any Medicare Supplement (Medigap) policy in Cape Coral, FL, with a guaranteed right. This period starts the month you are 65 or older and enrolled in Medicare Part B. Missing it means insurers can deny coverage or charge higher premiums due to pre-existing conditions, making timely premier Medicare enrollment in Cape Coral, FL assistance vital.