Medigap Guaranteed Issue Rights by State: 2026 Rules
Federal law gives every Medicare beneficiary one guaranteed Medigap enrollment window: the six months starting the first month they are 65 or older and enrolled in Part B. After that, whether your parent can buy a Medigap policy without medical underwriting depends almost entirely on where they live.
Some states extend strong protections year-round. Others offer narrow annual windows. Most offer nothing beyond the federal minimum. Here's the full picture.
The Federal Baseline: What Everyone Gets
Every state starts with these federal guaranteed-issue rights:
Initial Open Enrollment Period. Six months beginning the first month your parent is both 65+ and enrolled in Part B. The insurer can't deny coverage or charge more because of pre-existing health problems, although a limited pre-existing-condition waiting period can still apply in some circumstances. This is the single most important enrollment window in the entire Medicare system.
Triggering events. Outside the initial window, federal law grants guaranteed-issue rights when specific things go wrong — your parent's Medicare Advantage plan leaves their county, their employer coverage ends, or their Medigap insurer goes bankrupt. For most triggers, the application must be submitted no later than 63 days after the event; MA-related windows can also open 60 days before coverage ends.
Trial rights. If your parent enrolled in Medicare Advantage for the first time at 65 and wants to switch back within 12 months, or if they dropped a Medigap policy to try Medicare Advantage for the first time, federal trial rights allow guaranteed-issue Medigap purchases within the applicable window, which can run from 60 days before MA coverage ends to 63 days after it ends.
States with Continuous Guaranteed Issue
Five states require Medigap insurers to accept all applicants year-round, regardless of health or timing:
- Connecticut — continuous open enrollment for all Medigap plans
- Massachusetts — continuous open enrollment (uses its own plan structure: Core, Supplement 1, Supplement 1A)
- Maine — continuous open enrollment for all standardized plans
- New York — continuous open enrollment for all Medigap plans
- Vermont — continuous open enrollment for all standardized plans
In these states, your parent can switch from Medicare Advantage to Medigap at any time without medical underwriting. This is an enormous protection — it removes the one-way-door problem that makes the Medigap decision so high-stakes elsewhere.
States with Birthday-Rule Protections
Fifteen states in 2026 (sixteen starting 2027) give existing Medigap policyholders an annual window around their birthday to switch plans without underwriting. The specifics vary significantly:
| State | Window | Carrier rule | Plan options |
|---|---|---|---|
| California | 60 days from first of birth month | Any carrier | Equal or lesser benefits |
| Delaware | 30 days before to 30 days after birthday | Any carrier | Equal or lesser benefits |
| Idaho | 63 days from birthday | Any carrier | Equal or lesser benefits |
| Illinois | 45 days from birthday (ages 65–75 only) | Same carrier only | Equal or lesser benefits |
| Indiana | 30 days before to 30 days after birthday | Any carrier | Same plan letter only |
| Kentucky | 60 days from birthday | Any carrier | Same plan letter only |
| Louisiana | 63 days from birthday | Same carrier only | Equal or lesser benefits |
| Maryland | 30 days from birthday | Any carrier | Equal or lesser benefits |
| Nevada | 60 days from first of birth month | Any carrier | Equal or lesser benefits |
| Oklahoma | 60 days from birthday (active policy; max 90-day gap) | Any carrier | Equal or lesser benefits |
| Oregon | 30 days before to 30 days after birthday | Any carrier | Equal or lesser benefits |
| Utah | 60 days from birthday | Same carrier only | Equal, similar, or lesser |
| Virginia | 60 days from birthday | Any carrier | Same plan letter only |
| West Virginia | 60 days from birthday (24-month holding period) | Same carrier or affiliate, unless unavailable | Equal or lesser benefits |
| Wyoming | 63 days from birthday | Any carrier | Equal or lesser benefits |
| New Mexico | 60 days from birthday (effective January 2027) | Any carrier | Equal or lesser benefits |
Key distinctions to watch: "same carrier only" states restrict switching to another plan within your current insurer — useful for changing plan letters but not for finding a better premium from a competitor. West Virginia allows an exception if the carrier or plan is unavailable. "Any carrier" states allow shopping across insurers.
Free Download
Get the Medigap vs Medicare Advantage: Choosing Your Coverage — Quick-Start Checklist
Everything in this article as a printable checklist — plus action plans and reference guides you can start using today.
States with Federal Minimum Only
The remaining states offer no guaranteed-issue protections beyond the federal baseline. After the initial six-month open enrollment window closes, your parent generally must pass medical underwriting to buy or change Medigap plans unless another federal guaranteed-issue right applies. Conditions like diabetes, heart disease, COPD, or cancer can result in denial or significantly higher premiums.
The 63-Day Deadline
Most federal guaranteed-issue rights require applying no more than 63 days after the triggering event. For an MA plan leaving Medicare or the service area — and for Trial Right 2 — the application window can also open 60 days before coverage ends.
Missing this deadline by even one day can mean the difference between guaranteed acceptance and a medical underwriting review that results in denial. If your parent is approaching a coverage change, start the Medigap application process before the old coverage ends, not after.
What This Means for the Medigap vs Medicare Advantage Decision
Your parent's state protections should directly influence their initial coverage choice. In Connecticut, New York, Maine, Massachusetts, or Vermont, choosing Medicare Advantage at 65 carries lower switching risk because guaranteed issue applies year-round. In states with no birthday rule and federal-minimum-only protections, choosing Medicare Advantage means accepting that switching to Medigap later may be impossible if health has declined.
The full state-by-state switching rules, including waiver states (Wisconsin, Minnesota, Massachusetts) with non-standard plan structures, are covered in our Medigap vs Medicare Advantage decision guide.
Get Your Free Medigap vs Medicare Advantage: Choosing Your Coverage — Quick-Start Checklist
Download the Medigap vs Medicare Advantage: Choosing Your Coverage — Quick-Start Checklist — a printable guide with checklists, scripts, and action plans you can start using today.