I want to upgrade or downgrade my membership; how can I do this?

Please be aware that upgrading or downgrading an AO VET or an AO Spine membership is not possible. If you would like to upgrade or downgrade your membership, please cancel the current plan, wait until it has expired and then purchase the new membership accordingly: How can I renew my expired membership? - AO Wiki public - AO Foundation

Thank you for your understanding.