About the clinic and surgeon
Is the clinic accredited, and by whom? Is the surgeon or specialist board-certified in the relevant field?
Can you see before/after examples of the specific procedure you're considering, and speak to the surgeon (even briefly, remotely) before committing?
About what's included
Ask for an itemised breakdown, not a single headline number: does the price include the hotel, airport transfers, medication, and a translator? Is a second visit needed, and is that already priced in?
Confirm what happens if a complication arises: is follow-up treatment included, and for how long?
About logistics
Check visa requirements for your nationality well before booking flights. These vary by country and can change.
Ask how much notice you'd need to reschedule, and what the cancellation policy is.