Error code
PA4 — PA registration not valid on service date
PA registration not in effect
The Physician Assistant Pilot registration wasn't valid on the service date.
What to do: Compare the service date with the start and end dates of the PA Pilot registration.
- Code
- PA4
- Description
- PA registration not valid on service date
Explanation
Updated October 26, 2026
PA4 means the Physician Assistant Pilot registration wasn't in effect on the service date. Check the date and the registration period.
What it means
Error PA4 is the Ministry's "PA Registration on Service Date Error". The Physician Assistant (PA) Pilot registration on the claim was not valid on the date of service. The Ministry gives no further detail.
Common causes
- The service date is before the registration started or after it ended
- A typing error in the service date
How to fix it
- Check the service date on the claim.
- Check the start and end dates of the PA Pilot registration.
- If the service date was wrong, correct it and resubmit. If the registration did not cover the date, contact the Ministry about the registration before resubmitting.
Don't resubmit if
- The registration did not cover the service date and nothing has changed.
How APEX handles it
APEX reads your error reports and remittance advice from MCEDT and lists claims rejected with this code in its Correction Centre for you to correct and resubmit. See how APEX works · Pricing