He Takes Eliquis for an Irregular Heartbeat. At 71, That One Prescription Can Be Enough for a Medigap Insurer to Say No

He’s 71, otherwise healthy, and takes apixaban twice a day. Sold as Eliquis, it keeps atrial fibrillation from throwing a clot, and it’s the only thing on his medication list. His Medigap Plan G premium climbed again this year, so he did what brokers suggest and shopped a few other carriers.

The applications did not go the way he expected, and the prescription is why. If you enrolled in Part B more than six months ago and take an anticoagulant for AFib, the door behind you is narrower than it looks from inside the policy you already have.

What the Prescription Tells an Underwriter

Medigap has one federally guaranteed enrollment window: the six months beginning when you’re 65 or older and enrolled in Part B. Inside it, insurers can’t use your health information to deny you coverage or charge you more. Outside it, in most states, they can underwrite. That’s where the pharmacy record comes in. Signing a Medigap application also authorizes a prescription history lookup, usually through a service like Milliman IntelliScript or ScriptCheck. It returns years of filled prescriptions with doses and refill dates.

The drug is the tell. Carrier field guides connect apixaban to atrial fibrillation directly, and at least one lists recent AFib among conditions that produce a denial. Checking or not checking a box on the form doesn’t really decide anything, because the refill history answers the question either way. What the prescription doesn’t do is make the decision by itself. It points an underwriter toward a condition, and the condition gets evaluated. One carrier’s guide says every underwritten application receives a telephone interview, so there are people in this process. They simply already know what they’re calling to ask about.

Carriers also differ from each other. Some decline anticoagulant use outright. Others accept controlled AFib at a higher premium tier. An applicant can’t tell which is which from the outside, and every attempt costs time. 

The Open Window 

Federal law protects you during those first six months, and afterward only in a narrow set of guaranteed-issue situations: a Medicare Advantage plan leaves your area, an employer retiree plan ends, certain trial rights. Shopping around to save money isn’t on that list. Some states go further, with birthday rules, anniversary windows or continuous guaranteed issue. The protections vary in scope and conditions, so the only answer worth acting on is your own state’s. Elsewhere, underwriting generally applies unless a state-specific switching right is an option.  

The Cost of Staying Put 

Being locked in is a slow leak rather than a sudden loss. Medigap premiums climb with age and with the carrier’s book of business, and they climb against a Social Security raise tracking in the mid-3% range for 2027, with the official figure due in October.

Meanwhile the Medicare cost-sharing underneath keeps stepping up. The Part A inpatient deductible rose to $1,736 in 2026 from $1,676 in 2025. Daily hospital coinsurance for days 61 through 90 is $434. Skilled nursing coinsurance for days 21 through 100 runs $217 a day. Plan G still absorbs those, for Medicare-covered services from providers who accept assignment. IRMAA surcharges and the program’s other coverage gaps are separate costs it doesn’t reach, and we mapped those in a free guide to Medicare’s hidden bills.

Here’s what makes this less dire than it feels. Applying somewhere else cannot cost him the policy he already has. A Medigap policy is generally guaranteed renewable for as long as the premiums get paid. A carrier can raise his rate. It cannot drop him because a competitor turned him down. The only way he loses that coverage is by canceling it himself before a replacement is actually in hand.

Risk vs. Reward

The real risk isn’t rejection. It’s canceling something good in anticipation of something else that never arrives. Take these steps instead:

• Keep your current policy in force until a new one is issued in writing. Not approved verbally, not probably, but issued. A denial while you’re uncovered is far worse than a rate increase.
• Ask your current carrier whether it will move you to Plan N or high-deductible Plan G without full underwriting. Some will. Federal law doesn’t require it, so treat it as a question rather than a plan, but it’s the cheapest question available to you.
• Pull your own prescription history report before applying anywhere else. You’ll see what a carrier sees, and you can correct errors before they cost you an application instead of after.

The Eliquis is doing its job. The Medigap system is doing its job too, which is exactly why you need to be two steps ahead.

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