Mexican Social Security (IMSS)

The Mexican Social Security Institute ( Instituto Mexicano del Seguro Social, IMSS) is a government  organization that attends to public health, pensions and social security in Mexico, operating under the Secretary of Health (Secretaría de Salud).


The Mexican government, through the Mexican Institute of Social Security (IMSS for its Mexican initials), provides affordable health insurance for all residents of Mexico regardless of their nationality.

Your coverage will be activated after you start to work at ASF, once accepted, you will be covered for life, as long as you continue to pay your yearly premiums. To apply you will need:

  • Two photocopies of your current passport and immigration documentation
  • Copies of either your FM-T, FM-2 or FM-3 (tourist/expatriate visas)
  • Duplicate copies of your marriage license (if applicable)
  • Two copies of your most recent utility or telephone bill in your name or a lease agreement in your name
  • Three passport-type photographs
As a foreigner applying for IMSS, you may not receive treatment for pre-existing illness for the term of your coverage. These exclusions do not include treatment for any other illness that are acquired during your stay in Mexico. Pre-existing illness are defined as:
  • Malignant tumors (cancer)
  • Chronic degenerative disease such as that which is seen with long-standing diabetes, liver disease (cirrhosis, hepatitis, etc.), kidney disease (renal failure or renal insufficiency), heart disease (previous heart attack, arrhythmia, or valvular disease), lung disease (chronic bronchitis, emphysema, etc.), neurologic disease (multiple), cerebrovascular disease (stroke or TIA), peripheral vascular disease, and many others.
  • Drug or alcohol dependency
  • Psychiatric illness
  • HIV positive status or history of AIDS
  • History of traumatic or muscular injury that continues to require treatment

It is mandatory by law for everyone who works in Mexico to be affiliated to IMSS.