1) Initial Enrollment Period: the seven-month runway
Most people get an Initial Enrollment Period that starts three months before the month you turn 65, includes your birthday month, and runs three months after. That is your first clean shot at Part A, Part B, and usually Part D without needing a special excuse.
If you are collecting Social Security or Railroad Retirement benefits before 65, Part A often starts automatically. Part B is not always automatic. Assuming "somebody handled it" is how people step on a rake.
2) Working past 65: the employer coverage trapdoor
Active employer coverage (yours or your spouse's) can delay Part B without penalty if the coverage is creditable and you follow the rules when that coverage ends. The failure mode is retiring on Friday, losing group insurance, and discovering Part B cannot start tomorrow.
When the job ends, you typically get an eight-month Special Enrollment Period for Part B that begins the month after employment or coverage ends, whichever comes first. Miss that and you may be stuck waiting for the General Enrollment Period with a permanent late penalty possibility.
3) Special Enrollment Periods worth knowing
Beyond the job story, Medicare recognizes SEPs for moves out of a plan's service area, certain Medicaid events, institutional moves, and other situations spelled out in Medicare manuals. The details matter: some SEPs are two months, some longer, and documentation requirements vary.
Moving from Charlotte to a mountain county is not cosmetic. Your Advantage plan may not serve the new address. Treat an address change like a financial event, because it is.
4) Annual Election Period: October 15 - December 7
Each fall you get a chance to change Part D or Medicare Advantage coverage effective January 1. This is when we fix formulary mistakes, network drops, and premium creep. Waiting until January to complain about December's bill is theatrics, not planning.
5) Penalties that do not care about your excuses
Late Part B enrollment can add a permanent 10% premium increase for each full 12-month period you could have had Part B but did not enroll (unless you qualify for a SEP). Late Part D enrollment can add a 1% per month penalty based on rules Medicare publishes, applied to the national base beneficiary premium and rounded.
Those percentages sound small until you multiply them across a retirement measured in decades.
6) NC-specific practical habits
- Keep every creditable coverage letter from employer or retiree plans.
- Confirm your effective dates in writing after any online enrollment.
- Update your address with Social Security and every plan the same week you move.
- Do not "guess" SEP eligibility. If you think you have one, prove it with dates and documents.
7) When to call us
If your situation touches work coverage, COBRA, retiree wrap plans, or a move across NC lines, call before you click enroll. We map dates like an air traffic controller and document the path so you can sleep.