You enroll through IMSS’s voluntary Seguro de Salud para la Familia program and pay an annual fee based on your age. That gets you into Mexico’s public hospitals for doctor visits, surgery, and prescriptions.
What Is IMSS and Why Do Expats Use It?
IMSS (Instituto Mexicano del Seguro Social) is Mexico’s national public healthcare system. It runs hospitals, clinics, and pharmacies across the country. If you have ever driven past a green-and-white hospital in Tijuana or La Paz with a long line out front, that was IMSS.
For expats, the draw is cost. IMSS covers doctor visits, hospitalization, surgery, lab work, prescriptions, and maternity care. The annual fee for a 50-year-old is around $14,250 pesos ($713 USD). Compare that to private health insurance at $45,000 to $60,000 pesos per year. The savings are significant.
The trade-off is speed and comfort. IMSS clinics are busy. Wait times can stretch to hours. Most staff speak only Spanish. The facilities are functional, not luxurious. But the medical care itself is competent, and for routine needs, it works.
Who Is Eligible to Enroll?
You need legal residency in Mexico. Temporary or permanent, either qualifies. Tourist visa holders (FMM) cannot enroll. You also need a CURP, which INM issues automatically when you receive your resident card.
There is one critical restriction: you cannot have a pre-existing condition that falls on IMSS’s excluded list. Congenital conditions, malignant tumors, HIV/AIDS, and addictions disqualify you from enrollment. Other pre-existing conditions are accepted but subject to waiting periods before IMSS covers treatment for them.
There is no upper age limit for enrollment. A 75-year-old can sign up. The cost goes up with age, but access stays open.
How Much Does It Cost?
IMSS charges an annual fee per person based on age. You pay the full year upfront. As of March 2025, the rates are:
Ages 0 to 19: $8,900 pesos ($445 USD). Ages 20 to 29: $11,100 pesos ($555 USD). Ages 30 to 39: $11,850 pesos ($593 USD). Ages 40 to 49: $13,800 pesos ($690 USD). Ages 50 to 59: $14,250 pesos ($713 USD). Ages 60 to 69: $19,800 pesos ($990 USD). Ages 70 to 79: $20,650 pesos ($1,033 USD). Ages 80 and older: $21,300 pesos ($1,065 USD).
Each family member pays individually. A couple in their 50s pays around $28,500 pesos per year ($1,425 USD) for both. IMSS updates these rates annually in March, tied to inflation.
What Documents Do You Need?
Gather these before you visit the IMSS office. Missing one document means a wasted trip.
Your valid passport. Your Mexican residency card (Residente Temporal or Permanente). Your CURP printout. A certified translation of your birth certificate into Spanish by a certified translator (traductor certificado). A Mexican proof of address (comprobante de domicilio) dated within the last three months. A utility bill, bank statement, or rental contract works. Two passport-size photos.
Some IMSS offices ask for additional copies. Bring three photocopies of every document. The copy shop near any IMSS office knows exactly what people need. Look for the signs that say “copias.”
How Do You Enroll Step by Step?
Start at the IMSS website. Go to imss.gob.mx/derechoH/escritorio-virtual and create an account using your CURP. You can begin the Seguro de Salud para la Familia application online. The system walks you through entering your personal data and selecting your designated clinic (Unidad de Medicina Familiar, or UMF).
After the online portion, you visit your assigned IMSS subdelegation office in person. Bring all documents listed above. The staff will review your application, verify your residency status, and process payment.
Payment is for the full year. IMSS accepts cash and debit cards at most offices. Some locations now process payment through the IMSS portal online. Ask at your local office which method they prefer.
Once you pay, IMSS assigns you to a UMF clinic near your registered address. This is your primary care clinic. All routine visits start here. Your assigned family doctor (medico familiar) handles general consultations and refers you to specialists when needed.
Where Are the IMSS Offices in Baja California?
In Tijuana, the IMSS subdelegation is on Boulevard Agua Caliente 10610, Colonia Aviacion, C.P. 22420. Phone: 664 972 9885. This is the main administrative office for enrollment. Your assigned UMF clinic for daily healthcare will be closer to your registered address.
In Ensenada, the office is at Calle Alvarado 297, Centro, C.P. 22800. Open Monday through Friday, 8:00 a.m. to 3:30 p.m. Phone: 646 178 8710.
Both offices process foreigner enrollments. Bring a Spanish speaker if your Spanish is limited. The enrollment staff rarely speak English.
Where Are the IMSS Offices in Baja California Sur?
In La Paz, the IMSS delegation is on Avenida Constituyentes de 1975, Fraccionamiento Capullo Sector Inalapa, C.P. 23098. Open Monday through Friday, 8:00 a.m. to 3:30 p.m. Phone: 612 122 3251.
In Los Cabos, the IMSS facility is on Carretera a Todos Santos at Kilometer 1.5, Brisas del Pacifico, C.P. 23473. Los Cabos has grown fast, and the IMSS infrastructure is still catching up. Expect longer wait times for specialist referrals compared to La Paz.
What Does IMSS Cover?
The Seguro de Salud para la Familia covers general medical consultations with your assigned family doctor. Specialist referrals through the IMSS referral system. Hospitalization and surgery. Prescription medications dispensed at IMSS pharmacies. Lab work and diagnostic imaging. Maternity care including prenatal visits, delivery, and postnatal checkups. Emergency care at any IMSS facility nationwide.
If your UMF clinic cannot handle your case, your doctor refers you to a higher-level IMSS hospital. In Baja California, Hospital General Regional No. 20 in Tijuana is the main referral hospital. In Baja California Sur, Hospital General de Zona No. 1 in La Paz handles complex cases.
What Does IMSS Not Cover?
IMSS excludes several categories. Dental care beyond basic extractions. Eye care and eyeglasses. Hearing aids. Elective cosmetic surgery. Infertility treatments. Weight loss surgery. Treatment for self-inflicted injuries.
Pre-existing conditions on the excluded list (malignant tumors, congenital conditions, HIV/AIDS, addictions) are permanently excluded. Other pre-existing conditions face waiting periods before coverage begins. The specific waiting period depends on the condition. Ask your IMSS office for the current schedule when you enroll.
What Are the Waiting Periods?
After you enroll, IMSS does not cover everything immediately. There is a general waiting period before certain services become available. IMSS members enrolled through employment get priority over voluntary enrollees.
Waiting periods for voluntary enrollment range from 30 days for basic consultations to 2 years for certain surgeries and chronic condition management. The exact timeline varies by condition and service type. Your assigned UMF clinic can provide the specific waiting period schedule when you enroll.
Emergency care has no waiting period. If you need urgent treatment the day after enrollment, IMSS covers it.
Can You Use IMSS Anywhere in Mexico?
Yes. Your IMSS coverage is national. If you enroll in Tijuana and travel to Mexico City, you can walk into any IMSS emergency room and receive care. For non-emergency visits, you use your assigned UMF clinic. If you move within Mexico, you can transfer your assignment to a new UMF near your new address.
Should You Get IMSS, Private Insurance, or Both?
Many long-term expats in Baja carry both. IMSS handles routine care: checkups, prescriptions, blood work, minor issues. Private insurance handles the big events: hospitalization, surgery, specialist care at private hospitals with shorter wait times and bilingual staff.
IMSS at $14,250 pesos per year plus a private plan at $45,000 pesos per year totals around $59,250 pesos ($2,963 USD). That combination gives you comprehensive coverage at a fraction of what comparable insurance costs in the U.S.
If budget is tight, IMSS alone provides solid baseline coverage. Just know that wait times for specialist appointments can stretch to weeks. For anything time-sensitive, you may end up paying out of pocket at a private clinic anyway.
What Mistakes Do Expats Make with IMSS?
Enrolling without a translated birth certificate. The IMSS office will turn you away. Get the translation done before your appointment.
Forgetting that coverage is per person. A couple must enroll and pay separately. One enrollment does not cover a spouse.
Expecting English-speaking staff. IMSS offices and clinics operate in Spanish. Bring a friend who speaks Spanish, or hire a facilitator for the enrollment visit.
Missing the renewal window. IMSS coverage runs exactly one year from enrollment. If you miss the renewal date, you lose coverage and must re-enroll, potentially facing new waiting periods.
Regulations and government processes change. This article reflects information current as of March 2026. For advice specific to your situation, consult a licensed immigration consultant or contact the relevant government office directly.