
It is not uncommon for individuals to have multiple health insurance plans. For example, a person may have health insurance through an employer but also be covered by their spouse's health insurance. In such cases, it is important to understand the difference between primary and secondary insurance. The primary plan is the main insurance policy that covers medical care first, and the secondary plan covers the remaining costs. While individuals cannot choose which plan is their primary coverage, there are rules that determine this, such as the subscriber/policyholder's plan being the primary insurance.
| Characteristics | Values |
|---|---|
| Can you have two health insurance plans? | Yes, it is perfectly legal to have two health insurance plans. |
| Who is the primary insurer? | The primary insurer is the one who pays first, up to the coverage limits. |
| Who is the secondary insurer? | The secondary insurer pays any remaining costs after the primary insurer has paid up to its coverage limits. |
| How is the primary insurer decided? | The primary insurer is usually the subscriber/policyholder. If you are covered under an employer-based plan, that is primary. If you are a dependent on two plans, the policyholder with the earlier birthdate is the primary insurer. |
| What are the advantages of having two health insurance plans? | More comprehensive coverage, greater protection from loss of coverage, and lower extra costs. |
| What are the disadvantages of having two health insurance plans? | More out-of-pocket costs, complex claim processing, and higher costs due to two monthly premiums and deductibles. |
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What You'll Learn

Medicare and the U.S. Department of Veterans Affairs (VA)
If you have medical coverage through the U.S. Department of Veterans Affairs (VA), you may be eligible for Medicare coverage as well. You can have both VA benefits and Medicare, but they do not work together. This means that Medicare does not pay for any care received at a VA facility, and VA benefits will not pay for Medicare cost-sharing (deductibles, copayments, coinsurances).
If you want your Medicare coverage to pay for your care, you must receive care at a Medicare-certified facility that works with your Medicare coverage. Similarly, for your VA coverage to cover your care, you must generally receive healthcare services at a VA facility. However, if the VA authorizes services in a non-VA hospital and does not pay for all the services during your hospital stay, Medicare may pay for Medicare-covered services that the VA does not.
If you have Medicare Part B (coverage for doctors and outpatient services) and you cancel it, you won't be able to get it back until January of the following year. You may also have to pay a penalty to get your coverage back. Therefore, it is encouraged to enroll in Medicare as soon as you are eligible.
If you have Medicare Part D (coverage for prescription drugs), you can use it to get medicine from non-VA doctors and fill your prescriptions at your local pharmacy instead of through the VA mail-order service. There is no penalty for delaying Medicare Part D as long as you enroll when you are first eligible or within 63 days of when you no longer have VA health care or other creditable prescription drug coverage.
If you are covered under the Civilian Health and Medical Program of the Department of Veterans Affairs (CHAMPVA), you will need to pay Medicare Part B premiums (monthly payments for insurance coverage) yourself. CHAMPVA is always the secondary payer to other health insurance policies, except in special cases.
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Primary and secondary insurance coordination
If you have two health insurance plans, it is important to understand the difference between primary and secondary insurance. This is known as "coordination of benefits" (COB), and it is the process that decides which insurance pays for a claim first.
The "primary payer" is your main insurance policy and will cover your medical care first, up to the limits of its coverage. The "secondary payer" only pays if there are costs that the primary insurance didn't cover. If the secondary payer doesn’t cover the remaining balance, you may be responsible for the rest of the costs.
In most cases, the health plans will perform coordination of benefits using the “birthday rule”. This means that if your birthday month occurs earlier in a calendar year than your spouse or partner’s, your plan will be primary and vice versa. If you share the same birthday month, the plan that has provided coverage for the longest time is usually the primary payer.
It is important to note that you don't get to choose which plan is your primary or secondary coverage. When you file a claim, your insurance carrier will cover you from your primary health plan as if you had no secondary coverage. Then, your secondary health insurance plan will cover any remaining amount.
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Dual coverage
Having dual coverage or two health insurance plans is perfectly legal. However, it is important to coordinate your two policies correctly to ensure your medical expenses are covered. When you have two health insurance policies, one is designated as the primary payer and the other as the secondary payer. The primary payer covers your medical bills up to the coverage limits, and the secondary payer covers the remaining bill, if necessary. This process is called the Coordination of Benefits (COB) and ensures that the total amount paid by both plans does not exceed 100% of the medical costs.
The primary payer is typically your main insurance policy, such as an employer-sponsored or individual plan, while the secondary payer is usually a parent's or spouse's plan. If you are covered by your parents, the "birthday rule" decides which parent's insurance is the primary payer. In this case, the primary coverage will come from the parent whose birthday comes first in the calendar year.
It is important to note that having dual coverage can result in more out-of-pocket costs, as you will be responsible for both plans' monthly premiums and applicable cost-sharing. Additionally, having two separate plans can make processing health insurance claims more challenging, especially for out-of-network claims.
However, there are several benefits to having dual coverage. Firstly, it provides more comprehensive coverage, as multiple medical policies offer more benefits. Secondly, it offers greater protection from the loss of coverage. For example, if you have coverage through your spouse's plan and a company plan, you will not lose health insurance if you lose your job. Lastly, dual coverage can help reduce coverage gaps. If one of your policies lapses, you will still have coverage through your second plan.
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COB rules
When a person has more than one health insurance plan, Coordination of Benefits (COB) rules determine how the insurance companies will work together to pay an insurance claim. The COB process is used to clarify which plan is the primary payer and which is the secondary payer. It also ensures proper claim processing and helps avoid overpayment or duplicate payments.
The primary plan is responsible for processing the claim first and paying up to its coverage limit. The secondary plan then reviews the claim and pays any remaining balance within its coverage limits. This order of payment is called "coordination of benefits".
There are various scenarios in which someone might have two health insurance plans. For example, a person might have their own insurance plan and also be covered by their spouse or partner's plan. In this case, the individual's own insurance plan is typically the primary payer, while their spouse or partner's plan is the secondary payer. If a couple has dependent children, the primary payer for the children would be the parent with child custody. If parents share joint custody, the order of benefits typically follows the "birthday rule", with the primary insurance being the one held by the person whose birthday falls earlier in the year.
If a person has COBRA continuation coverage and coverage from another plan, the benefits of the plan covering them as a member or employee are primary, while the COBRA continuation coverage is secondary. If neither plan specifies coordination of benefit rules, the plan that has covered the person for the longer time is usually the primary payer.
It is important to note that COB rules can vary depending on factors such as the insurance company, the specific insurance plans involved, and the state in which the insured person lives.
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Primary insurance determined by the birthday rule
The birthday rule is a widely accepted insurance claims practice that determines the order of payment when a dependent child is covered by both parents' health insurance plans. The rule, created by the National Association of Insurance Commissioners (NAIC), is endorsed by many states and insurers but is not a law. It states that the parent whose birthday comes first in a calendar year has the primary coverage for the child, while the other parent's policy provides secondary coverage.
The birthday rule is based on the month and day of the parents' birthdays, not the birth year, so it doesn't matter which spouse is older. For example, if one parent's birthday is in March and the other's is in October, the parent with the March birthday will have primary coverage for their child. This rule ensures that the child's medical expenses are covered without exceeding 100% of the total cost.
The birthday rule is particularly relevant in situations where the child has medical complications that require an extended hospital stay. In such cases, determining which insurance pays first is crucial. It also helps coordinate benefits for dependent children's healthcare services and can influence the cost of copays, coinsurance, and deductibles.
While the birthday rule is the general standard, there are exceptions and alternative procedures. For instance, if both parents share the same birthday, the parent who has been covered by their plan for a longer period will provide primary coverage for the child. Additionally, if one parent has health insurance through their current employer, and the other parent has coverage through a former employer (such as COBRA), the plan belonging to the currently employed parent will be the primary coverage for the child.
It is important to note that having dual insurance coverage is perfectly legal, but proper coordination between the two policies is essential to ensure compliance and avoid complexities in claim processing. Individuals with dual coverage should be aware of the primary and secondary designations and understand the advantages and potential downsides of each plan.
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Frequently asked questions
Yes, you can have two health insurance plans and it is perfectly legal. However, it is important to understand how primary and secondary insurance works.
When you have both primary and secondary insurance, each plan pays a portion of your medical bills. Your primary insurer pays first, up to the coverage limits. The secondary insurer then pays any remaining costs.
A plan where you are the subscriber/policyholder is automatically the primary insurance. If you are a dependent on two plans, such as both parents' plans, the primary coverage will come from the parent whose birthday comes first in the calendar year. If you are the subscriber on two different plans through two different employers, the one you've had the longest is primary.
Having two health insurance plans can help with medical bills, offer greater protection from loss of coverage, and reduce coverage gaps.
Having two separate plans can make processing health insurance claims more challenging and lead to higher costs, as you may be responsible for two monthly premiums and two deductibles.










































