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.