Yes, plan on it. Mexico's immigration agency says visitors entering by land must show a valid passport or a U.S. passport card, and the card works only at land crossings and in the border zone (INM). To get back into the U.S. by land, U.S. citizens need a passport book, passport card, enhanced driver's license or trusted traveler card such as SENTRI (CBP). If any part of your trip is by plane, bring a passport book.
Which document works for which part of the trip
A Tijuana surgery trip has two border checks: Mexico on the way in, and U.S. Customs and Border Protection (CBP) on the way back. Each side has its own list. The table shows what each document is good for, based on CBP and Mexican immigration rules.
| Document | Into Mexico by land | Back to the U.S. by land or on foot | Back to the U.S. by air |
|---|---|---|---|
| U.S. passport book | Yes | Yes | Yes |
| U.S. passport card | Yes, for the border zone only | Yes | No |
| SENTRI, NEXUS or FAST card | Not on Mexico's list; carry a passport book or card too | Yes | Yes |
| Enhanced driver's license | Not on Mexico's list | Yes | No |
| Regular driver's license (including REAL ID) | No | Not on CBP's list | No |
| Green card (lawful permanent residents) | Check with Mexico's consulate | Yes | Yes |
Sources: CBP (WHTI), INM, U.S. Embassy in Mexico.
The U.S. rules come from the Western Hemisphere Travel Initiative (WHTI). CBP says travelers without a WHTI document are "likely to be delayed at the border" while officers check who they are and whether they are citizens (CBP). After surgery, a long delay in a secondary inspection room is the last thing you want, so bring a document that is clearly on the list.
Driving or walking into Tijuana
The U.S. Embassy in Mexico tells U.S. citizens crossing by land to "be prepared to present a passport book or passport card" (U.S. Embassy). Tijuana sits right on the border, so a passport card is enough for the Mexican side as long as you stay in the border zone.
The FMM entry permit
Mexico's visitor permit is called the FMM (Forma Migratoria Múltiple). The official guidance is not fully consistent. The U.S. Embassy says most land travelers need one, but people staying in a border city for less than 7 days may not have to show it (U.S. Embassy). Mexico's consulate in San Diego says all foreign nationals traveling to Mexico for less than 180 days have to fill out an FMM (Consulate of Mexico in San Diego). Many surgery trips also run longer than a week. The simple, safe choice is to get an FMM for any surgery trip. You can apply online and print it, or get it from an immigration officer at the crossing. An FMM is good for one entry and up to 180 days (INM).
If you drive
The Embassy says your U.S. car insurance is not enough in Mexico; you need a separate Mexican policy. Tijuana is in the border zone and the Baja California peninsula, so you do not need a temporary vehicle import permit to drive there (U.S. Embassy). Many patients don't drive at all after surgery. If a clinic or recovery house picks you up, ask which crossing they use and how long the drive back usually takes.
Flying in or out through Tijuana airport
Some patients fly into Tijuana's airport (TIJ) from other parts of Mexico or fly home from there. Two rules matter:
- Any flight back into the U.S. needs a passport book. CBP says all U.S. citizens need a passport book to re-enter by air. Passport cards are not accepted for air travel (CBP). Mexico also says the passport card cannot be used for international air trips (INM).
- Cross Border Xpress (CBX) is an enclosed walkway from the Tijuana airport to a terminal in Otay Mesa, San Diego. Only people with a ticket for a flight at the Tijuana airport can use it, and CBP runs it as a U.S. port of entry (CBP). A passport book covers you whichever way you go through it.
The match between your name on the ticket and on your ID matters too. CBP says tickets should be bought in the exact name on your passport or ID (CBP). This can trip up patients who booked under a nickname or a married name.
Children and teens
If a child is traveling with you (for example, a parent who has surgery and brings the family), the U.S. rules differ by age and route:
- By land: U.S. citizen children under 16 may show a birth certificate (original or copy), a Consular Report of Birth Abroad or a naturalization certificate when they come back from Mexico (CBP). Children under 19 traveling with a school, church or sports group can use the same documents with a signed group letter.
- By air: children need their own passport (CBP).
On the Mexican side, the FMM conditions say each applicant must hold a valid passport or passport card (INM), so plan on a passport card or book for every child, even though a birth certificate works for the U.S. side. Mexico has its own rules for children entering the country, which can change. Check with a Mexican consulate before you go, especially if only one parent is traveling.
Green card holders
WHTI did not change the rules for lawful permanent residents. CBP says they must keep showing their permanent resident card (Form I-551) to come back in, and do not need a passport for the U.S. side (CBP). Mexico may still ask for your home-country passport, so check before you book.
Is SENTRI worth it for a surgery trip?
SENTRI gives pre-approved travelers dedicated fast lanes at southern land border crossings. To join, you apply online, pay a fee, pass a background check and go to an in-person interview at an enrollment center (CBP, CBP: how to apply). That process is not built for a one-time trip. It makes more sense for people who live near the border or expect several visits, such as a dental implant plan with two or three trips. For a single trip, a passport card is the practical upgrade. It has a radio chip that lets a car use the Ready Lane at San Ysidro, as long as every adult over 16 in the car has a chip-enabled card (CBP). For more on the city itself, see our Tijuana guide.
A document checklist for surgery patients
CBP's own advice is to carry your travel documents with you, not pack them (CBP). For a medical trip, keep these in one folder you can reach while sitting in a car or wheelchair:
- Passport book, or passport card if you are going by land only.
- Your printed FMM.
- Your clinic's address and phone number, and the name of your surgeon.
- Your discharge papers and medicine list, in English if possible.
- Any medicine in its original container with your name on it. Our guide to flying after surgery covers what to carry for the trip home.
- Proof of any travel or complication insurance. See our guide to medical tourism insurance.
If you are staying in a recovery house, its staff often handle the drive to the border. Our guide to recovery houses in Tijuana explains what they usually include.
Things we could not confirm
The State Department's Mexico country page has its own entry and passport-validity guidance, but its website blocked our automated checks, so we did not quote it. Read it yourself before you travel. Rules on both sides can change, so check CBP and the U.S. Embassy pages a week or two before your trip.
Related reading
Frequently asked questions
Can I go to Tijuana with just a driver's license?
Can I use a passport card to get into Mexico?
Do I need a passport to go to Tijuana for the day?
Do you need a passport to walk into Tijuana?
What if my passport expires soon?
References
- Western Hemisphere Travel Initiative.U.S. Customs and Border Protection (2026)
- Know Before You Go: Your Trip.U.S. Customs and Border Protection (2024)
- Multiple Immigration Form (FMM): conditions for land entry.Instituto Nacional de Migración (Mexico)
- Driving to Mexico.U.S. Embassy & Consulates in Mexico (2026)
- Visas: Frequently Asked Questions.Consulate General of Mexico in San Diego (SRE)
- CBP Partners for New Cross Border Terminal; Cross Border Xpress (CBX).U.S. Customs and Border Protection (2014)
- Secure Electronic Network for Travelers Rapid Inspection (SENTRI).U.S. Customs and Border Protection (2025)
- How to Apply for SENTRI.U.S. Customs and Border Protection
- CBP Announces Date for Ready Lane at San Ysidro.U.S. Customs and Border Protection (2011)
- Travel Tips Ensure Smooth CBP Processing Experience.U.S. Customs and Border Protection (2019)