When Can I Change Medigap Plans
Technically anytime; practically it depends on your state — outside guaranteed-acceptance windows, changing plans or carriers means new health underwriting, except in the handful of states with annual switching rights.
| When | Underwriting? | Source |
|---|---|---|
| First 6 months (OEP) | Never | Federal — OEP file |
| GI events (63-day windows) | Never | Federal — GI file |
| Birthday rule states (annual) | Never (30 days) | CA + ~a dozen states |
| NY/WI/MA/MN | Never (year-round) | System states |
| Everywhere else, anytime | Usually yes | Health questions apply |
The safe-switching sequence
Apply to the new carrier first, hold approval in hand, then cancel the old policy — a gap between Medigap policies cannot be retroactively fixed and re-opens underwriting risk. The full playbook is in switching rules.
Plan-letter changes vs carrier changes
These are two different switches: letter changes (N→G) are upgrades carriers underwrite carefully; carrier changes with the same letter (G→G) are the common price-driven move. Both follow the same state rules — check your state’s page on the state board.
FAQ
Can I change Medigap plans in the middle of the year?
Yes — there is no annual lock like Part D/MA; only underwriting stands in the way outside GI windows.
Does changing plans restart my OEP?
No — the six-month OEP is a one-time event at 65+.
Related reading: FAQ library · Switching rules · State board