IMSS or Private Insurance in Mexico: Which Should You Choose?

One of the key considerations when living in Mexico is how to pay for healthcare. Many expats and digital nomads pay out of pocket for medications and routine appointments. But most want insurance coverage for more expensive care – such as surgery or a major medical emergency. When considering health insurance options, the deciding factor isn’t as simple as, “Do I get public IMSS or private insurance in Mexico?” These two different options solve different health problems and risks for expats. Modalidad 33 is the low-cost public health insurance with broad, catastrophic-style coverage. Private insurance is pricier and underwriting-based, but offers more flexibility.

How IMSS voluntary enrollment (Modalidad 33) works

Mexico’s public healthcare program is run by the Instituto Mexicano del Seguro Social (IMSS). The program has two different pathways. Mexican nationals or legal foreign residents who are formally employed are required to enroll and contribute funds to the IMSS. This health insurance is required even if they also have private insurance. The program covers employees and their families.

The Modalidad 33 is a paid, voluntary insurance that legal foreign residents who are not formally employed can purchase. US citizens who have retired in Mexico fall into this category. Legal residency status (temporal or permanente) is required. Those with a FMM visitor permit are not eligible. Enrollment is done directly with IMSS, not an insurance broker. This insurance requires an annual age-based fee. See the table for the current fees.

Age Range	Annual Fee in Mexican Pesos
0-19	$8,900
20-29	$11,100
30-39	$11,850
40-49	$13,800
50-59	$14,250
60-69	$19,800
70-79	$20,650
80 and over	$21,300

The IMSS-Bienestar insurance is not designed for foreign residents. It is a free health insurance program with limited resources and capacity intended for uninsured Mexican nationals.

Modalidad 33 excludes major pre-existing conditions. This includes congenital diseases, chronic kidney/heart/liver disease, drug and alcohol addiction, mental illness, cancer, and HIV. If you have one or more of these health issues, you cannot enroll in the IMSS program. Some pre-existing conditions are not excluded, but are deferred. This means you are subject to a waiting period before you can receive care for them through the IMSS system. A link to the full list of exclusions, including those with waiting periods, is available here.

Medical visits are in public IMSS clinics and hospitals. The public health system is known for long waits and variable quality of service, and English-speaking staff is uncommon and should not be expected. IMSS coverage does not include dental or vision care. IMSS coverage is only available in Mexico. 

How private Mexican insurance (GNM) works

Private insurance is known as Gastos Médicos Mayores (GNM). These plans are purchased through an insurance broker. The plans are underwritten individually, with premiums and eligibility depending on age and health history. GNM covers care at private hospitals and generally offers a broader choice of healthcare providers. Wait times are typically shorter as well.

The cost of GNM premiums increases annually and can become quite high. This is due to medical inflation. Medical inflation in Mexico has surged in recent years, leading to the highest medical cost inflation globally this year. In 2026, private insurance premiums increased between 20% and 40%. This is largely driven by rising costs of new technology and specialized drugs, post-pandemic demand for elective care, and tax changes. Check the Health Cost Planner to get an idea of your potential costs.

IMSS Modalidad 33	GNM
Lower fixed cost	Higher, age-scaled premiums
Broad enrollment access	Individual underwriting
Public hospital and clinic network	Private hospital access
Less flexibility for treatment locations	Greater choice of providers

Neither Modalidad 33 nor GNM coverage will replace Medicare coverage that retirees lose when living in Mexico. Medicare coverage is available under very limited conditions for someone outside of the United States.

Why some expats carry both — or neither

A common pattern for expats is to balance costs with their preferred care. They do this by pairing paying cash for routine private care and using Modalidad 33 as a low-cost option for catastrophic events. Younger, healthier retirees often skip formal insurance coverage entirely. Instead, they self-insure by creating a dedicated healthcare fund. This allows for a lower fixed cost but involves a higher risk if an emergency or accident occurs.

For expats who want US-style flexibility in their healthcare, there is a third option in the form of international expat health insurance. Also known as a travel policy, this is another form of private medical coverage. A key difference is that coverage is not limited to Mexico, but can cover someone worldwide – sometimes even in their home country. This long-term coverage is for anyone living or working outside of their home country for a year or more. Many of these plans have optional emergency evacuation coverage.  The drawback for this type of plan is the substantially higher cost, often $6,000 USD or more per year.

Deciding whether IMSS vs private insurance in Mexico is right for you

So, how do you know which is best? As with most things, that choice is highly individualized. The first step is to know what your personal health history includes – and be honest about it. Do you have health issues that might fall under the exclusions? You can’t just skip over a chronic disease when applying for GNM insurance and think the insurance company won’t find it when doing the underwriting.

Also, understand what is important to you. Some expats choose the private insurance option solely because they don’t speak Spanish and want to ensure they have care from English-speaking staff.

Consider how much you have saved for your health care as you age and what type of care is important to you. This isn’t a one-time decision. You will revisit this decision regularly as you age, your health changes, and your budget shifts. Don’t rely on someone else’s numbers. Use the Health Cost Planner to model your own situation with realistic numbers. Remember to revisit this annually, especially around age-premium jumps.

FAQ

1.   Can US retirees enroll in IMSS?

Yes, foreign residents with legal residency status can enroll in IMSS voluntary insurance (Modalidad 33) directly through IMSS.

2.   Does IMSS cover pre-existing conditions?

Coverage of pre-existing conditions is limited and subject to exclusions or waiting periods — confirm the current rules directly with IMSS before enrolling.

3.   Is private Mexican insurance more expensive than IMSS?

Generally yes — private GNM premiums are individually underwritten and scale with age, while IMSS premiums follow a fixed public fee schedule.