Error code
MX — Maximum of 2 arthroscopy "R" codes with E595 reached
Arthroscopy add-on limit
The maximum of two arthroscopy R codes billed with the E595 add-on was reached, so further R codes aren't paid with E595.
What to do: Check the arthroscopy codes billed for the patient that date against the current Schedule's payment rules.
- Code
- MX
- Description
- Maximum of 2 arthroscopy "R" codes with E595 reached
Explanation
Updated October 26, 2026
MX means the maximum of two arthroscopy R codes with the E595 add-on was reached.
What it means
MX means the maximum of two arthroscopy "R" codes billed with the add-on E595 has been reached. Further R codes on that claim are not paid with E595.
How to fix it
- Check the arthroscopy codes billed for the patient on that date.
- Check the arthroscopy listings and payment rules in the current Schedule of Benefits.
- If you believe the decision is wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with supporting details.
Don't resubmit if
- The limit was already reached.
- The line is already on your RA. Question it with an RAI, not a new claim.
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