Key points
- Mexico runs a mixed system: social-security institutions for formal workers plus public provision for people without social security.
- The constitution guarantees health protection; which institution covers a person depends on where they work — IMSS, ISSSTE or IMSS-Bienestar.
- Care is delivered by the public institutions' own facilities and by a large private sector, which many people use and pay for directly.
- Public care is free for the affiliated, but households still pay more than a third of all health spending out of pocket (OECD Health at a Glance 2025).
- Life expectancy at birth was 75.5 years in 2024, and health spending was 5.9% of GDP in 2024 (OECD Health at a Glance 2025).
Direct answer: Mexico runs a mixed system: social-security institutions for formal workers plus public provision for people without social security. The constitution guarantees health protection, and which institution covers a person depends on where they work: IMSS (Instituto Mexicano del Seguro Social) for private-sector workers, ISSSTE for federal government workers, and IMSS-Bienestar for people without social security. Care is delivered by the public institutions' own facilities and by a large private sector, which many people use and pay for directly. Public care is free for the affiliated, but households still pay more than a third of all health spending out of pocket (OECD Health at a Glance 2025). Life expectancy at birth was 75.5 years in 2024, and health spending was 5.9% of GDP in 2024 (OECD Health at a Glance 2025).
At a glance
| Item | Detail |
|---|---|
| Model | Mixed — social security + public provision (IMSS-Bienestar) |
| Who pays | Payroll contributions for IMSS and ISSSTE; general taxation for IMSS-Bienestar and public services; households pay more than a third of spending out of pocket (OECD Health at a Glance 2025) |
| Who delivers | Public facilities run by IMSS, ISSSTE and IMSS-Bienestar; a large private sector of hospitals, clinics and doctors |
| What is free at the point of use | Public care and medicines free for the affiliated; people outside the schemes, and private care, are paid for directly |
| Life expectancy at birth | 75.5 years (2024, OECD Health at a Glance 2025) |
| Health spending | 5.9% of GDP (2024, OECD Health at a Glance 2025) |
| Source for the model and coverage | Commonwealth Fund — Mexico country profile |
Figures are a snapshot checked 7 November 2026, not a live feed. No country is ranked as best.
How the system works
Mexico’s system is fragmented by employment. The Mexican Social Security Institute (IMSS), established in 1943, covers private-sector workers, retirees and their families. The Institute for Social Security and Services for State Workers (ISSSTE), formed in 1959, covers federal government workers and their families. People without social security were covered by Seguro Popular, a public insurance scheme launched in 2003 that grew to cover about 53 million people by 2018; it was replaced in 2020 by the Institute of Health for Well-being (INSABI), which in turn was dissolved by federal decree in May 2023, with its responsibilities transferred to IMSS-Bienestar, a decentralised public body that now provides free medical care and medicines to people without social security (Commonwealth Fund).
Each institution runs its own facilities, so where a person is treated depends on which institution covers them. The private sector — hospitals, clinics and doctors in private practice — sits alongside the public institutions and is used widely, including by people who hold public cover but seek faster access or services the public system does not provide promptly.
Who pays, and what people pay
Payroll contributions fund IMSS and ISSSTE, and general taxation funds IMSS-Bienestar and the public services run by the Ministry of Health. Public care is free for the affiliated, including medicines in public facilities. What people still pay is substantial: households bore more than a third of all health spending directly (OECD Health at a Glance 2025), and private insurance covers only a small share of the population, mainly people on higher incomes. The transition from Seguro Popular to INSABI coincided with a rise in reported uninsurance — from 9.5% of older adults in 2018 to 27.2% in 2021 — and persistently high out-of-pocket spending, particularly for medicines (Health Policy, 2026).
What is free, and what is not
Care in public facilities is free for people covered by IMSS, ISSSTE or IMSS-Bienestar, including medicines supplied through the public system. What is not free is the margin: private consultations, diagnostics and hospital stays, medicines bought outside the public system, and care for people who fall between the schemes or cannot reach a public facility in time. The boundary is set by which institution covers the patient, and by whether the care is available in a public facility nearby.
How it compares
Mexico spends 5.9% of GDP on health — below the OECD average of 9.3% — and $1,588 per person, the lowest spending per person among the OECD profiles in this set and far below the OECD average of $5,967 (USD PPP, 2024). Its life expectancy of 75.5 years (2024) is the lowest among the OECD profiles in this set and 5.6 years below the OECD average of 81.1 years (2023, OECD Health at a Glance 2025). Its distinguishing feature is the churn: the cover for people without social security has been rebuilt three times in two decades — Seguro Popular, then INSABI, then IMSS-Bienestar — while out-of-pocket spending has stayed high throughout. Mexico also has among the fewest hospital beds in the OECD table (1.0 per 1,000 people) and diabetes prevalence among the highest in the OECD (14.3% of adults in 2022). Compare countries side by side in the Health System Comparison tool, or read the other profiles in the country index.
Frequently asked questions
Is healthcare free in Mexico?
Public care is free for people covered by IMSS, ISSSTE or IMSS-Bienestar, including medicines in public facilities. In practice many people still pay directly — households bore more than a third of all health spending out of pocket (OECD Health at a Glance 2025).
Which institution covers me — IMSS, ISSSTE or IMSS-Bienestar?
It depends on the job: IMSS covers private-sector workers and their families, ISSSTE covers federal government workers, and IMSS-Bienestar covers people without social security. IMSS-Bienestar took over in 2023 from INSABI (2020–2023), which had replaced Seguro Popular (2003–2020).
Why do so many Mexicans pay out of pocket?
Coverage is fragmented by employment, public provision has gaps, and private care is widely used — so a large share of care is paid for directly, even though public care is free for the affiliated.