| Agency Name: | Mexican Institute of Social Security |
| Parent Agency: | Secretary of Health |
| Formed: | January 19, 1943 |
| Jurisdiction: | Federal government of Mexico |
| Headquarters: | Reforma 476, Col. Juárez, México City |
| Employees: | 360,106 (2007) |
| Budget: | MXN$335 billion (2021) |
| Chief1 Name: | Zoé Robledo Aburto |
| Chief1 Position: | General Director |
| Website: | www.imss.gob.mx |
The Mexican Institute of Social Security (Spanish; Castilian: '''Instituto Mexicano del Seguro Social''', IMSS) is a governmental organization that assists public health, pensions and social security in Mexico operating under the Secretariat of Health. It also forms an integral part of the Mexican healthcare system.
The IMSS was founded by Mexican President Manuel Ávila Camacho on January 19, 1943 to satisfy the legal precepts established in the Article 123 of the Mexican Constitution. It is constituted by representations of the workers, employers, and the federal government.
It is the largest social welfare institution in all Latin America.
For some time, however, there have been festering signs of trouble in IMSS, such as serious financial problems that came to a head in early November 2010.
| officeholder | term in office | |
|---|---|---|
| Vicente Santos Guajardo | 1940-1944 | |
| Ignacio García Téllez | 1944-1946 | |
| Antonio Díaz Lombardo | 1946-1952 | |
| Antonio Ortiz Mena | 1952-1958 | |
| Benito Coquet Lagunes | 1958-1964 | |
| Sealtiel Alatriste Ábrego | 1964-1966 | |
| Ignacio Morones Prieto | 1966-1970 | |
| Carlos Gálvez Betancourt | 1970-1975 | |
| Jesús Reyes Heroles | 1975-1976 | |
| Arsenio Farell Cubillas | 1976-1982 | |
| Ricardo García Sainz | 1982 - 1991 | |
| Emilio Gamboa Patrón | 1991 - 1993 | |
| Genaro Borrego Estrada | 1993-2000 | |
| Mario Luis Fuentes Alcalá | 2000 | |
| Santiago Levy Algazi | 2000-2005 | |
| Fernando Flores y Pérez | 2005-2006 | |
| Juan Francisco Molinar Horcasitas | 2006-2009 | |
| Daniel Karam Toumeh | 2009-2012 | |
| José Antonio González Anaya | 2012-2016 | |
| Mikel Andoni Arriola Peñalosa | 2016–2017 | |
| Tufic Miguel Ortega | 2017–2018 | |
| Germán Martínez Cázares | 2018–2019 | |
| Zoé Robledo Aburto | 2019– |
The Mexican Social Security law currently in effect, published in the Official Journal of the Federation (21 December 1995), is the legislative domain under which the IMSS carries out its operations.
Currently the law indicates that Social Security has the following purposes:
The law contemplates two domains, an "obligatory" one (funded by individual, employer and state contributions), and a "voluntary" one (aimed at workers in household industries and self-employed professionals).
The following items are excluded from the base quoted salary: