Medicare Supplement Underwriting: Questions, Rules and How to Switch

We do not offer every plan available in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.

Medicare Supplement underwriting is the health review an insurer can do when you apply for a Medigap plan outside a protected enrollment window. It’s the reason many people feel “stuck” in a plan they no longer want. This guide explains when you have to answer health questions, the kinds of Medicare Supplement underwriting questions insurers ask, what happens after you apply, and how to switch plans safely.

What Is Medicare Supplement Underwriting?

Underwriting is how an insurer decides whether to accept you and at what price. During your Medigap Open Enrollment Period, federal law blocks insurers from using your health to deny you or charge you more. Outside that window, and without a guaranteed issue right or a state protection, insurers in most states can ask health questions, review your prescriptions and decide whether to approve you.

Medigap underwriting is usually a short application, sometimes followed by a phone interview. There’s rarely a medical exam. But the questions are strict, and one “yes” can end the application.

When You Don’t Have to Answer Health Questions

Before worrying about underwriting, check whether you’re in a window where it doesn’t apply:

• Medigap Open Enrollment: your six months starting the first month you’re both 65 or older and enrolled in Part B. It happens once and doesn’t come back.
• Federal guaranteed issue rights: for example, when your Medicare Advantage plan leaves your area or stops serving Medicare, your employer or union coverage that pays after Medicare ends, or your Medigap insurer goes bankrupt or misleads you. These rights usually last 63 days after the coverage ends. See Medicare.gov’s guaranteed issue rights.
• The trial right: if you joined Medicare Advantage when first eligible at 65, or dropped a Medigap policy to try Medicare Advantage for the first time, you generally have 12 months to switch back without underwriting.
• State protections: some states go further. New York and Connecticut allow Medigap enrollment year-round without health underwriting. About 15 states now have a yearly “birthday” or anniversary rule that lets you switch to a plan with equal or lesser benefits without health questions. They include California, Oregon, Idaho, Illinois, Kentucky and Maryland, and the details differ by state. Check with your state insurance department.

Common Medicare Supplement Underwriting Questions

Every insurer writes its own application, but the questions follow a familiar pattern. These are typical examples, not any one company’s list:

Current situation

• Are you currently hospitalized, in a nursing home, or receiving home health care?
• Do you need help with daily activities such as bathing, dressing or eating?
• Have you been advised to have surgery, tests or treatment that haven’t been done yet?

Ever been diagnosed with or treated for (common “knockout” conditions)

• Alzheimer’s disease or dementia
• Kidney failure requiring dialysis, or an organ transplant
• ALS, Parkinson’s disease or multiple sclerosis
• HIV or AIDS
• Congestive heart failure

Within a recent period, often the last 2 to 5 years

• Cancer (other than some skin cancers), or treatment for it
• Heart attack, heart surgery, stent, stroke or TIA
• COPD or emphysema, especially with oxygen use
• Diabetes with complications, or insulin use above a set daily amount
• A hospital stay, or multiple stays, for any reason

Medications and build

• A list of your current prescriptions. Some drugs point to a knockout condition, for example medicines used only for dementia or after a transplant.
• Height and weight, compared with the insurer’s build chart
• Tobacco use, which may change your rate

Knockout Conditions vs. Conditions That Just Raise the Price

Many Medigap applications are pass/fail: a “yes” to a knockout question ends the application with that insurer. Other conditions don’t stop you but may mean a higher premium where state law allows. Common, well-controlled conditions, such as high blood pressure, high cholesterol, or type 2 diabetes managed with pills, are often accepted by at least some insurers. Because each company’s list is different, a decline from one insurer doesn’t mean every insurer will say no.

Medicare Supplement Underwriting Results: What Happens After You Apply

How to Switch Medicare Supplement Plans Safely

1. Keep your current plan. Never cancel it before the new plan approves you in writing.
2. Compare the same plan letter first. Plan G from one company covers exactly what Plan G from another covers (except in Massachusetts, Minnesota and Wisconsin), so switching companies for a lower price is often the simplest move. See the Medicare.gov plan comparison.
3. Answer honestly. A wrong answer can let the insurer cancel the policy later and refuse claims.
4. Use the 30-day free look. When you replace a Medigap policy, you have 30 days to decide whether to keep the new one. You pay both premiums for that month.
5. Cancel the old plan only after the new one is in force, and ask the old insurer to confirm the end date in writing.

Switching From Medicare Advantage to a Medicare Supplement

This is where underwriting surprises people most. You can leave Medicare Advantage during the Annual Enrollment Period (October 15 to December 7) or the Medicare Advantage Open Enrollment Period (January 1 to March 31). But unless you have a trial right, a guaranteed issue right or a state protection, the Medigap insurer can use underwriting. A smart sequence:

1. Apply for the Medigap plan first, with a start date that matches when your Medicare Advantage coverage will end (often January 1).
2. Wait for written approval.
3. Then enroll in a stand-alone Part D plan and leave Medicare Advantage, so there’s no gap in coverage.

If you’re declined, you can stay in your Medicare Advantage plan. That’s why the order matters. Learn more about Medicare Advantage and changing Medicare plans.

Switching From Plan G to Plan N (or a High-Deductible Plan)

Many people look at a “downgrade”, for example from Plan G to Plan N or high-deductible Plan G, to lower their premium. In most states this still requires underwriting unless a birthday rule or other state protection applies. Some insurers offer simplified questions for switching to a plan with fewer benefits within the same company, but that’s a company policy, not a right. Compare the costs carefully in our Plan G vs. Plan N guide.

What to Do if You’re Declined

• Try another insurer. Knockout lists and lookback periods differ.
• Keep your current Medigap plan. Your insurer can’t cancel it because your health changed, as long as you pay the premium.
• Watch for a guaranteed issue right or your state’s birthday window.
• Consider Medicare Advantage during the Annual Enrollment Period, since Medicare Advantage plans can’t use health underwriting. Weigh the network and copay trade-offs first.

Medigap Underwriting in Massachusetts

Massachusetts does Medigap differently. Instead of lettered plans, it uses Core, Supplement 1 and Supplement 1A. Under the state’s rules (211 CMR 71.00), every insurer must hold a yearly open enrollment from February 1 to March 31, for coverage starting June 1. Insurers may also choose to accept applications all year (continuous open enrollment). Premiums are community rated, so your age and health don’t change the price. Ask each insurer which enrollment periods it offers, and read our guide to Medicare supplement plans in Massachusetts.

Lookback Periods in Medicare Supplement Underwriting

Many Medicare Supplement underwriting questions ask about a specific time frame, called the lookback period. For example: “In the past 2 years, have you been hospitalized for…?” or “In the past 5 years, have you been treated for cancer?” If your event happened before that window, you can usually answer “no”. That’s why timing matters. Someone treated for a heart condition 26 months ago may qualify with a carrier that uses a 2-year lookback, but not with one that uses 5 years. An agent can match your history to each carrier’s lookback periods before you apply.

How Long Does Medicare Supplement Underwriting Take?

Medicare Supplement underwriting is usually quick. Most decisions take a few days to two weeks. The insurer reviews your application, checks prescription history and sometimes calls you for a short phone interview to confirm answers. It rarely orders medical records or an exam. Apply early, ideally 30 to 60 days before you want the new plan to start, so you have time to try another insurer if the first says no. Keep copies of everything you submit.

Before You Apply: A Quick Checklist

• A current list of every prescription, with dose and what it’s for
• Dates of any hospital stays, surgeries and major diagnoses in the past 5 to 10 years
• Your height and weight
• Your Medicare number and Part A and B start dates
• Your current plan’s name, letter and renewal date
• Whether you have any guaranteed issue right or a state birthday window coming up

Is It Worth Switching Medicare Supplement Plans?

The most common reason people face Medicare Supplement underwriting is a rate increase. Medigap premiums can rise every year, and the same plan letter can cost very different amounts from one insurer to the next. Switching may be worth it when:

• You can get the same plan letter for a meaningfully lower premium, for example $30 or more a month
• Your current insurer has raised rates sharply several years in a row
• You want a plan with fewer benefits and a lower premium, such as moving from Plan G to Plan N

It’s usually not worth it if the savings are small, or if a new plan would add a waiting period for a condition you’re being treated for. A simple example: saving $40 a month is $480 a year, or $4,800 over 10 years. That’s worth an application if you’re healthy enough to qualify, but not worth risking your coverage.

Medicare Supplement Underwriting for Couples

Each spouse is underwritten separately, even if you apply at the same time with the same company. One spouse may be approved while the other is declined. Many insurers offer a household discount when both spouses enroll or when you live with another adult, so check how a switch by one spouse affects the discount for the other before you apply.

How an Agent Helps With Medigap Underwriting

Because every insurer uses different questions, lookback periods and medication lists, the biggest mistake is applying “blind” and collecting declines. Before you apply, a licensed Octans agent can review your health history against several carriers’ underwriting guides, tell you which ones you’re likely to qualify with, and compare prices for the same plan letter. There’s no cost for this review, and you keep your current plan until a new one is approved.

Why Honest Answers Matter

Insurers check your answers against prescription databases and medical records, sometimes after the policy is issued. If they find a misstatement, they may rescind (cancel) the policy and refuse claims, leaving you without coverage and possibly without a guaranteed way to get it back. If you’re not sure how to answer a question, ask the insurer or a licensed agent before you submit the application.

Medicare Supplement Underwriting FAQ

Do all Medicare Supplement plans require underwriting?

No. During your six-month Medigap Open Enrollment Period, or when you have a guaranteed issue right, insurers can’t use your health to deny you or charge more. Outside those times, most insurers in most states can use underwriting.

Can a Medicare Supplement insurer drop me because my health changes?

No. Medigap policies are guaranteed renewable. As long as you pay your premiums, the insurer can’t cancel your plan because of your health.

Does Medicare Supplement underwriting include a medical exam?

Rarely. It’s usually a written or online application with health questions, a prescription history check and sometimes a short phone interview.

Can I switch Medicare Supplement plans at any time?

You can apply at any time, but outside protected windows the new insurer can ask health questions. Some states, such as New York and Connecticut, allow switching year-round, and about 15 states have a yearly birthday or anniversary rule.

What is the birthday rule for Medigap?

It’s a state rule that gives you a yearly window around your birthday to switch to a Medigap plan with equal or lesser benefits without health questions. Window lengths and rules differ by state.

Related Coverage and Guides

• What are Medicare supplements?
• Plan G vs. Plan N
• Medicare supplement plans in Massachusetts
• Medicare Advantage (Part C)
• How and when to change Medicare plans
• Medicare guides

Sources: Medicare.gov, guaranteed issue rights; Medicare.gov, compare Medigap plan benefits; Massachusetts 211 CMR 71.00; NAIC state insurance departments.

Important: Octans Insurance agents are licensed in the states in which they operate. Coverage availability and rates may vary by state. Premium examples, when provided, are illustrative samples from published sources, not quotes. Final rates are determined by the insurance carrier based on underwriting and applicable policy criteria. Policy terms, exclusions, limitations, riders, and availability vary by carrier and state.

Want Help Switching Your Medicare Supplement?

Start with a free, no-obligation quote review with a licensed Octans agent.

GET YOUR FREE QUOTE

(617) 935-9220 | life@octansinsurance.com