Error code
66 — Reduced under Alternative Payment Program (APP) contract
Reduced under APP contract
Payment was reduced because an Alternative Payment Program funding contract covers this service.
What to do: Check whether you or the location were under an APP contract on the service date; if so, the reduction is expected.
- Code
- 66
- Description
- Reduced under Alternative Payment Program (APP) contract
Explanation
Updated October 26, 2026
Payment was reduced under an Alternative Payment Program (APP) funding contract that covers this service.
What it means
Code 66 means the payment was reduced per an Alternative Payment Program (APP) funding contract. Physicians paid through an APP receive funding under that contract, so the fee-for-service payment is reduced.
The Error Report has a related rejection, ESD: the hospital emergency department is part of an alternative funding agreement.
How to fix it
- Check whether you or the location are covered by an APP contract on the service date.
- If so, the reduction is expected.
- If you believe OHIP got it wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with your supporting details.
Don't resubmit if
- The service falls under your APP contract.
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