What is Pay As Guest? Pay as Guest offers the convenience of online bill payment using a credit or debit card. Please have your Atrius Health paper billing statement available for reference, and enter the Account # (located in the upper right side of your billing statement) and the last name of the account holder listed on the statement to whom the bill is mailed. Sign Up for a MyHealth Account! MyHealth Online is a secure portal that allows you to access portions of your health record, view payment history, pay bills online and communicate with your doctor's office about non-urgent matters. Complete an online application today.