Why a "stack" and not a checklist
Most pre-travel checklists are long, flat lists where "confirm airport pickup" sits next to "verify the surgeon's license." That makes it easy to feel ninety percent ready when the one item that matters most is still open.
A stack works differently. The layers are in order, and each one only makes sense once the layer beneath it is solid:
- Clinician: is the person treating you who they say they are, and qualified for this?
- Facility: is the place where it happens authorized and equipped for this service?
- Procedure: is this the right treatment for you, and does the setting match its risks?
- Payment: do the money terms protect you if the clinical answer changes?
- Follow-up: is there a working path for aftercare after you leave?
The NHS treatment-abroad checklist (reviewed 2023) tells patients to confirm a provider's claims using independent sources. That rule runs through every layer below. For each layer, separate what the clinic says from what you can confirm independently.
Layer 1: Clinician
The question: Can I identify the person treating me and confirm, through an official source, that they're authorized to practice and trained in this specialty?
Evidence that counts: the full legal name and registration number; an entry in the official registry; specialty training that fits the procedure; written confirmation that this person will perform the key parts. In Colombia, the Ministry of Health's ReTHUS registry lists the health workers who satisfy the legal requirements to practice, and it also carries reported ethics-disciplinary sanctions.
Evidence that doesn't count: follower numbers, testimonials, a clinic brand name, a certificate photographed on a wall.
Stop signal: you can't get the doctor's full name, or the registry doesn't show them.
Layer 2: Facility
The question: Where exactly will the treatment happen, and is that site authorized for this service?
Evidence that counts: the facility's legal name and the treatment address; registration of that specific site; the service your procedure needs being enabled there. In Colombia, the provider registry (REPS) is kept by departmental and district health entities and consolidated by the Ministry. A Ministry characterization of REPS describes the data it holds: enabled services, complexity level, and installed capacity such as beds and operating rooms. How to read ReTHUS and REPS side by side is covered in ReTHUS vs REPS.
Evidence that doesn't count: an accreditation logo you haven't checked with the accreditor. The CDC Yellow Book (2026) also notes that even genuine accreditation does not guarantee a good outcome.
Stop signal: the facility is described only as "our clinic," or the address on your quote doesn't match a registered site.
Layer 3: Procedure
The question: Has a qualified clinician reviewed my case and recommended this treatment? Does the facility have what this procedure could need if something goes wrong?
Evidence that counts: a treatment plan based on your actual records or imaging, a named anesthesia provider, a clear account of material risks and alternatives, and an explanation of what backup is on site or nearby. Bleeding, ICU care and imaging are discussed in what your procedure actually needs.
Evidence that doesn't count: a package price based on a web form, or a promise that complications "don't happen here."
Stop signal: nobody has discussed complications or aftercare with you. The NHS checklist lists both as warning signs.
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Start from safemedicaltravel.coLayer 4: Payment
The question: If the clinician changes the plan, or says I'm not a suitable candidate, what happens to my money?
Evidence that counts: written terms covering the deposit's recipient, the refund and transfer conditions, the consequences of a medical "no" or a date change, and the currency of the final bill. The NHS checklist also tells patients to budget for currency swings, extra nights and any return visits. Ask the refund questions in deposits and refund policies before paying.
Evidence that doesn't count: a verbal promise, or a WhatsApp message from a personal account.
Stop signal: pressure to pay quickly, or a request to pay for a hospital or surgeon you haven't seen. The NHS cosmetic-surgery-abroad guidance (reviewed 2022) warns specifically against the second.
Layer 5: Follow-up
The question: Who looks after me once I've left, and how will they know what was done?
Evidence that counts: a named clinician or service at home who has agreed to see you; a written plan for stitch, drain or test follow-up; overseas contact details; and an agreement on which records you'll take home. The CDC Yellow Book reports the American College of Surgeons' recommendation to get a complete set of records before returning home. Setting this up ahead of time is covered in how to plan follow-up at home.
Evidence that doesn't count: "go to the emergency room if anything happens" as the whole plan.
Stop signal: no one at home knows you're going, and the clinic has no answer for what happens after day seven.
The one-page stack worksheet
Copy this into a notes app or onto paper. Fill in the evidence column with links, screenshots or document names, not impressions.
| Layer | Evidence I hold | Checked on | Status |
|---|---|---|---|
| 1. Clinician: name, registration, specialty, will operate | Holds / Open / Stop | ||
| 2. Facility: legal name, site, enabled service | Holds / Open / Stop | ||
| 3. Procedure: records reviewed, anesthesia, risks, backup | Holds / Open / Stop | ||
| 4. Payment: recipient, refund terms, currency, buffer | Holds / Open / Stop | ||
| 5. Follow-up: home clinician, plan, records, contacts | Holds / Open / Stop |
The rule is simple. Any "Stop" ends the process until it's resolved. An "Open" on layers 1–3 means you don't pay yet. An "Open" on layers 4–5 means you don't fly yet.
A worked example (illustrative)
A patient has a quote with a surgeon's full name, and a ReTHUS check that matches. Layer 1 holds. The quote names a clinic, but the address doesn't match any registered site the patient can find, so layer 2 is "Open." The patient feels confident because the price is good and the refund terms look fair, which are layers 4 and 5. The stack shows that confidence is misplaced. Nothing above layer 2 counts until the treatment site is confirmed. The patient's next step is one email: "At which registered site will my procedure take place?"
Where people usually get stuck
In practice, most stacks stall at the same two points. The first is the boundary between layers 1 and 2. A patient verifies a well-known surgeon, then assumes the place is fine because the surgeon is. Surgeons can work at more than one site, and the site determines the equipment, staffing and emergency backup. Check both, separately.
The second is layer 3, because it depends on a clinician actually reviewing your case. If the clinic hasn't asked for your records, imaging or medication list, the plan you've been given is a sales estimate, not a treatment plan. Asking "what do you need from me to confirm I'm a candidate?" usually moves things forward. If it doesn't, the stack has done its job by showing you where the gap is.
Recheck before you travel
Registries and terms can change. Re-run the layer 1 and 2 checks shortly before departure. Confirm that nothing in layers 3–5 has changed since you booked. If something material changes after you arrive, such as a different surgeon, facility or procedure, run that layer again before going ahead.
Frequently asked questions
Why does the order of the layers matter?
Because each layer depends on the one below it. Good payment terms or a smooth follow-up plan don't help if the clinician or facility can't be verified. Working bottom-up stops strong later layers from hiding a weak foundation.
Can I check all five layers myself?
You can check the factual parts yourself: registry entries, the facility's site and services, written terms, and your home follow-up arrangements. Clinical judgments, such as whether the procedure suits you, come from qualified clinicians. Your job is to make sure those judgments are actually made and written down.
Is accreditation part of the facility layer?
It can add information, but check it directly with the accreditor rather than trusting a logo. The CDC Yellow Book notes that accreditation does not guarantee a good outcome, so it supplements, rather than replaces, checking registration and services.
What should I do if a layer comes back "Open" right before my trip?
Treat it as a reason to pause. If it's layer 1, 2 or 3, don't proceed to treatment until it's resolved. If it's payment or follow-up, resolve it before you fly, even if that means changing dates.
Sources
- NHS — Treatment abroad checklist (reviewed 2023)
- NHS — Cosmetic surgery abroad (reviewed 2022)
- CDC Yellow Book 2026 — Medical Tourism
- Colombia Ministry of Health — ReTHUS
- Colombia Ministry of Health — Characterization of REPS
Sources were checked in October 2026. Registries and official guidance change; confirm with the relevant authority before you rely on them.
This site provides general information and lead-routing services, not medical advice. Provider introductions may be compensated. Verify credentials, facility status, pricing and clinical recommendations independently. Do not delay urgent or necessary medical care because of information on this site.