Yes, it is possible to import data into Cliniko from another practice management system! The best way to do it depends on the data you want to import.
Cliniko can mass transfer/import patient demographics, products, billable items, and any other contact lists you might have. You'll need the data from your current system in a .csv file (spreadsheet format)–our support team can definitely help you to make sure the files are Cliniko-ready!
Information such as invoicing history, treatment notes, and historical or upcoming appointments can either be manually re-created (we recommend this for forthcoming appointments and outstanding balances/account credits), or you can use our file attachments section for each patient to hold the data (we recommend this for treatment notes).
Here is an article with more information on how importing data into Cliniko works.
We also have a free transfer option from some systems.