Greg Dill
Courtesy: Medicare

If your family is anything like mine, everyone has a role to play or a responsibility in keeping the household running.

Since I wash dishes faster than anyone else, I’m the designated dishwasher. I’m also responsible for paying our medical bills. My wife and I have separate health plans, so I have to make sure that our providers have the up-to-date information they need to accurately bill our respective insurance plans.

If you have Medicare as well as other insurance, always be sure to inform your doctor, hospital and pharmacy. This is important because it will determine whether your medical bills will be paid correctly and on time.

When there’s more than one insurance payer, certain rules determine which one pays first. These rules are called “coordination of benefits.”

The “primary payer” pays what it owes on your bills first — and then sends the balance to the “secondary payer” to pay. In some cases, there may also be a third payer.

Medicare is the primary payer for beneficiaries who are not covered by other types of health insurance.

The primary payer pays up to the limits of its coverage. The secondary payer only pays if there are costs the primary insurer did not cover.

Keep in mind, however, that the secondary payer (which may be Medicare) may not pay all of the uncovered costs.

If you currently have employer insurance and it is the secondary payer, you may need to enroll in Medicare Part B before your job-based coverage will pay. (Most people who sign up for Part B for the first time this year will pay a monthly premium of $134.)

Here’s who pays first in various situations when you have Medicare and some other type of insurance, as well:

If you have retiree insurance (coverage from a former job), Medicare pays first.

If you’re 65 or older, have group coverage based on your or your spouse’s current employment and the employer has 20 or more workers, your group plan pays first. (If the company has fewer than 20 employees, Medicare pays first.)

Your group plan also pays first when you’re under 65 and disabled, have group coverage based on your or a family member’s current employment, and the employer has 100 or more employees. (Medicare pays first if the company has fewer than 100 employees.)

If you have Medicare because of end‑stage renal disease (permanent kidney failure), your group plan pays first for the first 30 months after you become eligible for Medicare. Medicare pays first after this 30‑month period.

Medicare may pay second if you are in an accident or have a workers’ compensation case in which other insurance covers your injury or you are suing another entity for medical expenses.

In such situations, you or your lawyer should inform Medicare as soon as possible. The following types of insurance usually pay first for services related to each type:

  • No-fault insurance (including automobile insurance);
  • Liability (including automobile and self-insurance);
  • Black lung benefits;
  • Workers’ compensation.

Medicaid and TRICARE (the healthcare program for U.S. armed service members, retirees and their families) never pay first for services that are covered by Medicare. They only pay after Medicare, employer plans and/or Medicare Supplement Insurance (Medigap) have paid.

For more information, read the booklet, “Medicare and Other Health Benefits: Your Guide to Who Pays First.” You can find it online at:

Or, call us toll-free at 1-800-MEDICARE (1‑800‑633‑4227) and ask that a copy be mailed to you. TTY users should call 1‑877‑486‑2048.

If you have questions about who pays first or about changes in your coverage, call the Benefits Coordination & Recovery Center toll-free at 1-855-798-2627. TTY users should call 1-855-797-2627.

You can also contact your employer or union benefits administrator. You may need to give your Medicare number to your other insurers so that your bills are paid correctly and on time.

Greg Dill is Medicare’s regional administrator for Hawai‘i, California, Nevada, Arizona and the Pacific Territories. You can always get answers to your Medicare questions by calling 1-800-MEDICARE (1-800-633-4227).


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