For new members, create an account through the Modern Animal app and select the Pay As You Go plan. A valid credit card is required to create a Modern Animal account in case of any no-shows or late cancellations, but you will not be charged.
For current All Access members, you can switch to Pay As You Go directly in your app. Go to Account > Settings > Membership Plan and tap Switch to Pay As You Go. Your pet's All Access benefits will continue until their renewal date.