Major Medical Insurance in Mexico: What U.S. and Canadian Expats Should Know

One of the most important things to understand is that Major Medical Insurance is designed primarily to protect you from significant, unexpected medical expenses, rather than to pay for every healthcare expense you may have throughout the year.

Here are some of the questions we hear most often from expatriates considering Major Medical Insurance in Mexico.

What Is Major Medical Insurance in Mexico?

Major Medical Insurance, known in Mexico as Gastos Médicos Mayores, is designed to provide financial protection against significant medical expenses resulting from covered illnesses, accidents, hospitalizations, surgeries, and other qualifying medical treatments.

Depending on the policy and insurance company, coverage may include expenses such as:

1. Hospitalization
2. Surgery
3. Physician and specialist fees
4. Diagnostic tests related to a covered illness or accident
5. Medications related to covered treatment or hospitalization
6. Medical treatments and procedures
7. Emergency care
8. Other eligible medical expenses specified in the policy

However, it is important to understand that Major Medical Insurance is not necessarily designed to cover every medical expense you have.

For example, many people assume that if they have a Major Medical policy, the insurance company will pay for their annual physical, routine bloodwork, general health screening, or other preventive checkups. This is not the case.

A routine annual checkup, for example, is generally different from a diagnostic test ordered because you are experiencing symptoms or because a doctor is investigating a covered medical condition. Whether a particular consultation, test, screening, or medication is covered depends on the specific policy and the reason it is being performed.

Does Major Medical Insurance cover routine doctor visits and medications?

This is one of the most common questions we receive.

Major Medical Insurance should not automatically be thought of as a plan that pays for your everyday healthcare expenses.

For example, you may visit your doctor once a year for a general physical, have routine bloodwork performed, or receive preventive screenings even though you have no symptoms or medical condition requiring treatment. These types of expenses may not be covered under Major Medical policy.

The same principle applies to medications. A medication may be covered when it is part of the treatment for a covered illness, accident, hospitalization, or qualifying medical condition, but that does not necessarily mean that all prescription or over-the-counter medications are covered.

This distinction is particularly important for expatriates who may be accustomed to health insurance systems where routine care, preventive care, prescriptions, and major medical expenses are all included in one plan.

Why the cheapest policy is not always the best option

A less expensive policy may have a higher deductible, a higher coinsurance percentage, a more limited hospital network, different coverage limits, or other conditions that may become important when you actually need to use the insurance.

For this reason, it is better to compare the overall coverage and out-of-pocket exposure, rather than simply comparing the annual premium.

A good insurance decision should consider not only “How much does this policy cost?” but also “What would I have to pay if I had a major medical event?”

What Is Coinsurance in Mexico Health Insurance?

Coinsurance is the percentage of an eligible medical expense that you share with the insurance company after the deductible has been applied.

For example, suppose your policy has:

1. A $20,000 MXN deductible
2. 10% coinsurance
3. A $50,000 MXN coinsurance limit

Imagine you have a covered medical expense of $220,000 MXN.

First, the deductible is applied:

$220,000 – $20,000 deductible = $200,000

Your 10% coinsurance would then be:

10% of $200,000 = $20,000

In this simplified example, you would pay:

1. $20,000 MXN deductible
2. $20,000 MXN coinsurance
3. Total: $40,000 MXN

The insurance company would cover the remaining eligible amount, subject to the terms and conditions of the policy.

Why is a coinsurance limit important?

Some policies have a maximum amount that you would have to pay in coinsurance during a covered claim or policy period.

For example, if your policy has 10% coinsurance with a $50,000 MXN limit, you would not necessarily continue paying 10% indefinitely as the eligible medical expenses become larger. Once the applicable coinsurance limit is reached, the insurance company's participation can increase according to the policy terms.

This is why simply seeing “10% coinsurance” on a quote does not tell you the entire story.

When comparing policies, ask:

What is the coinsurance percentage?

1. Is there a maximum coinsurance amount?
2. Can the coinsurance percentage or limit be changed?
3. How would changing it affect my premium?

Why does coinsurance matter?

Consider two policies that both have a 10% coinsurance.

At first glance, they may appear identical.

But if one policy has a coinsurance limit and the other does not, the amount you could ultimately pay out of pocket in the event of a very expensive claim could be significantly different.

This is why we recommend looking at the deductible and coinsurance together, rather than evaluating either one by itself.

A policy with a slightly higher premium may provide a lower potential out-of-pocket cost when you need significant medical care.

Are Pre-Existing Conditions Covered?

This is one of the most important questions for anyone applying for Major Medical Insurance, particularly for older applicants or people who have an existing medical history.

What is consider a pre-existing condition?

In simple terms, a pre-existing condition is a medical condition that existed before you applied for the insurance policy.

It does not necessarily mean that you already had a formal diagnosis.

During the insurance application process, the applicant should still disclose the symptoms and relevant medical history.

The insurance company may then evaluate the information and determine how the condition will be treated under the policy.

This is why it is important to understand that pre-existing conditions are evaluated individually.

Are all pre-existing conditions automatically excluded?

Not necessarily. This is an area where expatriates often receive conflicting information because different insurance companies can evaluate medical histories differently.

There is no single answer that applies to every applicant or every condition.

The insurance company's decision may depend on factors such as:

The type of medical condition

1. How serious the condition was
2. Whether it is currently active
3. Whether treatment is ongoing
4. How recently the condition occurred
5. Whether the condition has been resolved
6. The applicant's medical history
7. Medications currently being taken
8. Previous surgeries or hospitalizations
9. Medical records and supporting documentation
10. How much time has passed since the condition or treatment occurred

Every insurance company may evaluate pre-existing conditions differently

This is particularly important when comparing insurance options.

One insurance company may decline an application, while another may be willing to offer coverage with certain limitations. In another case, an insurer may offer coverage subject to a specific exclusion, additional premium, waiting period, or other conditions.

There is therefore no reliable way to determine whether a person will be accepted simply by looking at the name of the diagnosis.

The details matter.

For example, saying “I had cancer” does not provide enough information for an insurance company to evaluate the situation. The insurer may need to know what type of cancer it was, when it was diagnosed, what treatment was received, whether there has been any recurrence, and what the person's current medical status is.

The same principle applies to conditions such as diabetes, hypertension, thyroid disorders, heart disease, previous surgeries, orthopedic conditions, and many others.

Why should you disclose your medical history?

When applying for Major Medical Insurance, it is very important to provide accurate and complete information about your medical history.

Trying to leave out a previous diagnosis or treatment in the hope of obtaining a lower premium can create significant problems later.

If you submit a claim and the insurance company determines that the claim is related to a medical condition or history that was not properly disclosed, the insurer may review the medical records and determine whether the claim is covered according to the policy's terms and conditions.

Being transparent during the application process is one of the best ways to avoid surprises later.

Can an insurance company ask for medical records or additional information?

Yes. Depending on the applicant's age, medical history, declared conditions, or other circumstances, an insurance company may request additional medical information, records, tests, or examinations as part of its underwriting process.

This does not necessarily mean that the application will be declined. It means that the insurer needs additional information to evaluate the risk before making a final underwriting decision.

For this reason, it is important to remember that a quote is not the same as an approved policy. The final terms of coverage are determined by the insurance company after the underwriting process has been completed.

What are General Conditions?

The General Conditions are the document that establishes the terms, definitions, benefits, limitations, exclusions, procedures, and other rules that apply to the insurance policy.

While the exact format and content can vary between insurance companies and products, General Conditions commonly address areas such as:

1. Definitions: Important insurance and medical terms used throughout the policy.
2. Covered expenses: The types of medical expenses that may be covered, subject to the policy's conditions.
3. Exclusions: Medical conditions, treatments, procedures, or situations that are not covered.
4. Waiting periods: Conditions or treatments that may only be covered after a specified period.
5. Pre-existing conditions: How previous medical conditions are defined and treated.
6. Deductible and coinsurance: How the insured's participation in medical expenses is calculated.
7. Coverage limits: Maximum amounts or specific limits that may apply to certain benefits.
8. Hospital networks: The conditions that may apply when using hospitals or physicians within or outside the designated network.
9. Claims and reimbursement procedures: How and when a claim should be submitted and what documentation may be required.
10. Emergency care: How emergency situations are defined and handled.
11. Renewal conditions: Information regarding policy renewals and changes that may apply over time.

These details can make a significant difference when you need to use your insurance.

A Good Rule of Thumb

When reviewing a Major Medical Insurance policy, don't only look for the benefits.

Look for the limitations, exclusions, waiting periods, and conditions as well.

Those details may not seem important when everything is going well. But when you are facing a significant medical expense, they can become some of the most important parts of your policy.

Taking a little time to understand your General Conditions today can help you make a much more informed decision—and know what to expect from your insurance when you need it mo

The Bottom Line

Major Medical Insurance can provide valuable financial protection, but understanding how the policy works is just as important as choosing the insurance company.

Before purchasing a policy, make sure you understand:

1. What is covered and what is excluded
2. Your deductibles
3. Your coinsurance percentage
4. Whether there is a coinsurance limit
5. Your hospital network
6. Waiting periods
7. How pre-existing conditions are evaluated
8. Whether routine consultations and preventive care are covered
9. How prescription medications are treated
10. The policy's coverage limits

Choosing Health Insurance in Mexico?

For expats living in Mexico, taking the time to understand these details before purchasing a policy can make a significant difference if you ever need to use your insurance.

Deductibles, coinsurance, hospital networks, and medical history can all affect your coverage options. Novamar can help you compare available plans and understand the differences before applying.

Request a free quote from our English-speaking Health Insurance Advisors