How to Bill More than 99 Surgical Assistant / Anesthesia Units

The Ministry of Health's system was designed to only accept 2 digits for the quantity. As such, a service with over 99 units needs to be broken into two lines of service.

For example, if you want to submit a procedure and the total number of units is 120 (basic units + time units), you need to create one claim with two identical service codes - Line 1 with 99 units and Line 2 with 21 units.

REMINDER: You will need to flag the claim as manual review by checking the "Manual Review" box and submit a letter (with the start/ stop times and a total of units of the service) along with your patient notes (if required) to the Ministry of Health:

For instructions on how to create a Manual Review letter, please see Manual Review Instructions.

For more billing tips, please check out our OHIP Billing Tip Library.

Questions? Check under the HELP tab or send an email to support@mdbilling.ca.