Medicare Supplement

Changing your Medigap plan in San Jose: the timing windows that decide your price

SAN JOSE — If you already have a Medicare Supplement (Medigap) policy and you are wondering whether you can move to a different one, the honest answer is: it depends less on the plan you want and more on when you try to switch, and where you live.

Medicare SupplementSan Jose, CA

Unlike Medicare Advantage and Part D, Medigap does not have a yearly open enrollment window built into federal law. Outside of a few specific situations, an insurance company can look at your health, charge you more, or turn you down. Some states have added extra protections on top of the federal rules. California is one of them, though the details are worth confirming for your own situation before you cancel anything.

Here is how the pieces fit together for San Jose residents, which sits in Santa Clara County.

Your one-time Medigap Open Enrollment Period

The strongest protection you get in Medigap is your six-month Medigap Open Enrollment Period. It starts the first month you are 65 or older and enrolled in Part B. During that window, any Medigap policy sold in your state must be issued to you at the best available rate for your age, no matter what your health looks like.

That window does not repeat. Once it closes, switching Medigap plans becomes a different conversation.

What "medical underwriting" really means

If you apply for a new Medigap policy after your open enrollment window ends, most insurers will run medical underwriting. That means they can ask health questions, review your prescription history, and decide whether to accept you, charge you more, or say no. It doesn't mean you'll be denied — many people are approved — but it does mean the price and approval are not guaranteed.

This is why the first rule of switching Medigap is simple: do not drop your current policy until the new insurer has approved you and sent written confirmation.

Federal guaranteed-issue rights

In certain situations, federal law forces insurers to sell you specific Medigap policies without underwriting. These are called guaranteed-issue rights. Common triggers include:

• Your Medicare Advantage plan is leaving Medicare or leaving your service area.
• You moved out of your plan's service area.
• Your employer or union coverage that paid after Medicare is ending.
• Your Medigap insurance company goes bankrupt or misled you.
• You joined Medicare Advantage when you first turned 65 and want to switch back to Original Medicare within 12 months (the "trial right").

Each right has its own time limit — often 63 days — and its own list of which Medigap plans you can buy. Medicare.gov has the full chart, and the California Health Insurance Counseling and Advocacy Program (HICAP), which is California's SHIP, can walk you through your specific case for free.

State rules that go beyond federal law

A growing number of states have added their own Medigap switching protections. Depending on the state, these can include:

• Birthday rules: A window around your birthday each year when you can switch to an equal or lesser Medigap plan without underwriting.
• Anniversary rules: A similar window tied to the anniversary of your policy.
• Continuous or year-round open enrollment: Underwriting limits that apply all year.

California is often described as having a birthday rule, but the exact length of the window, which plans you can move to, and how "equal or lesser" is defined can change over time. Before you make a move based on it, confirm the current details with HICAP at 1-800-434-0222 or the California Department of Insurance. If you split time between states or recently moved to San Jose from elsewhere, the state where you live now is what controls your Medigap rules.

A practical order of operations

If you are thinking about switching:

1. Write down why you want to switch — price, service, a specific benefit — so you can tell whether a new plan actually solves it. 2. Call HICAP or 1-800-MEDICARE to see whether you have a guaranteed-issue right or a state protection available to you right now. 3. Apply for the new policy. If underwriting is involved, wait for a written approval. 4. Only then, cancel the old policy, and coordinate the effective dates so you are never uncovered.

Keep in mind that Medigap and Medicare Advantage are separate lanes. If you are currently on a Medicare Advantage plan in Santa Clara County and want to move to Original Medicare with a Medigap policy, you may need to time the switch with the Medicare Advantage Open Enrollment Period (January 1 – March 31) or the Annual Enrollment Period (October 15 – December 7), and you'll still face Medigap underwriting unless a guaranteed-issue right applies.