Medicare 2026

CHAMPVA and Medicare: Why You Need Parts A and B, and Who Pays First

If you have CHAMPVA — the Civilian Health and Medical Program of the Department of Veterans Affairs — and you're approaching or already on Medicare, the rules about how the two programs work together are worth understanding early. The short version: once you're Medicare-eligible, you generally need Medicare to keep your CHAMPVA benefits, Medicare pays first, and CHAMPVA may pick up some of what's left. Here's what that means in practice.

Why Medicare is required alongside CHAMPVA

CHAMPVA is a VA health benefit for certain spouses, surviving spouses, and children of veterans who meet VA criteria. Once you become eligible for Medicare — most commonly at age 65 — CHAMPVA requires that you have Medicare Part A (hospital) and Part B (medical). Without both, you can't start or keep CHAMPVA benefits. Enrolling in a Medicare Advantage plan (Part C), which bundles A and B through a private insurer, also meets the requirement.

At 65, CHAMPVA beneficiaries must show VA proof of Medicare enrollment. If you turn 65 and don't qualify for Medicare under your own or anyone else's Social Security record, you'll instead give VA a Social Security "notice of disallowance" confirming you don't qualify. That document is what keeps your CHAMPVA coverage active.

Who pays first

CHAMPVA is a secondary payer to Medicare. When you get care, your provider bills Medicare first. After Medicare processes the claim, CHAMPVA may pay some or all of what remains, based on CHAMPVA's allowable amount for the service. This order applies whether you have Original Medicare or a Medicare Advantage plan.

There are a few exceptions where CHAMPVA is secondary to other coverage instead: Medicaid, state victims-of-crime compensation programs, Indian Health Service, and supplemental CHAMPVA policies all pay after CHAMPVA. Also worth knowing: if you're eligible for TRICARE, you can't get care through CHAMPVA.

How costs line up

You're still responsible for your Medicare Part B premium — CHAMPVA doesn't pay that. CMS typically announces the Part B standard premium and deductible in the fall for the following year, so check Medicare.gov for the current amounts. The same goes for the income-related adjustments (IRMAA) that higher-income enrollees pay in addition to the standard premium.

On the CHAMPVA side, the VA's published cost sharing (page updated August 2026) includes a $50 per person calendar-year deductible for outpatient care and prescriptions (up to $100 per family), no deductible for inpatient care, a 25% cost share of the CHAMPVA allowable amount, and a $3,000 per household calendar-year catastrophic cap.

For outpatient care, CHAMPVA may cover some or all of your Medicare Part B deductible. If what's left of your Part B deductible is more than CHAMPVA's allowable amount for that claim, you pay the difference.

Prescription drugs: Part D or Meds by Mail?

You don't have to enroll in a Medicare Part D plan to keep CHAMPVA. VA offers a Meds by Mail program that ships maintenance medications at no cost — but there's an important catch: Meds by Mail can only be used if you have no other prescription drug coverage. If you enroll in a stand-alone Part D plan or a Medicare Advantage plan that includes drug coverage, you lose access to Meds by Mail.

If you do have another drug plan alongside CHAMPVA, the pharmacy bills CHAMPVA as the secondary payer. When both plans cover the prescription, you pay nothing out of pocket.

For 2027, Part D has a $2,400 annual out-of-pocket cap (it's $2,100 in 2026), and no Part D plan can charge more than a $700 deductible. The national base beneficiary premium — used to calculate the late-enrollment penalty, not what any specific plan charges — is $41.33 for 2027.

Original Medicare + Medigap vs. Medicare Advantage

Because CHAMPVA accepts either Original Medicare or Medicare Advantage as satisfying its coverage requirement, you can weigh the trade-offs:

• Original Medicare lets you see any provider nationwide that accepts Medicare, and you can add a Medigap policy to help with cost sharing. You'd typically pair this with a stand-alone Part D plan if you want drug coverage (which would end Meds by Mail eligibility).
• Medicare Advantage plans often bundle extras and may include drug coverage, but they generally use networks and may require referrals or prior authorization. Premiums, benefits, and networks vary by plan and location.

Neither approach is universally better; the right fit depends on your providers, your budget, your travel patterns, and how you want prescriptions handled.

Enrollment windows worth marking

The Medicare Annual Enrollment Period for 2027 coverage runs October 15 – December 7, 2026, with changes taking effect January 1, 2027. During this window you can join, switch, or drop Medicare Advantage and Part D plans.

If you also have Medicaid or qualify for Extra Help with prescription drug costs, you have a monthly Special Enrollment Period to move to Original Medicare with a stand-alone Part D plan or to switch stand-alone Part D plans. Full-benefit dual-eligible individuals can enroll in an integrated Dual Eligible Special Needs Plan (D-SNP) in any month.

And one planning note: the Social Security Administration announced a 3.6 percent cost-of-living adjustment for benefits payable beginning January 2027.

Where can you get help with Medicare questions?

For personalized Medicare questions, enrollment tools, and the latest figures as CMS releases them, visit Medicare.gov or call 1-800-MEDICARE (1-800-633-4227), available 24/7. For CHAMPVA-specific questions — eligibility, claims, Meds by Mail — contact VA directly.

Taking a little time to line up your Medicare enrollment, your CHAMPVA paperwork, and your prescription strategy before you turn 65 (or before your next AEP) can save you real money and prevent gaps in coverage.