Contact Quadax

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Contact Quadax Client Support


Client Support: EDI

Xpeditor, RemitMax, Audit Control Axis, Decision Intelligence or Medical Necessity Data files
Phone: 866.422.8079
Fax: 440.777.2330
Monday – Friday
6:00 a.m. – 5:00 p.m. ET

Client Support: Labs

HARP, Patient Advocacy, or OnBase
Phone: 800.982.0665
Fax: 440.777.2330
Monday – Friday
8:30 a.m. – 7:00 p.m. ET


If experiencing critical issues with HARP, Patient Advocacy, or OnBase outside of normal business hours, after-hours support is onsite and available to assist you from 7:00 a.m. ET Monday – 5:00 p.m ET Saturday.

You can rely on Quadax EDI

EDI Client Online Support

Locked out of the Quadax Portal or need a password reset? Forgot your password or login ID? Support events can also be logged through the Portal during off hours and will be addressed on the next business day.

Quadax Locations


Corporate HQ

7500 Old Oak Boulevard
Cleveland, OH 44130
Phone: 440.777.6300
Fax: 440.777.2330


Software Development Campus

7070 American Veterans Pkwy
Cleveland, OH 44130



Quadax offices are closed in observance of the following holidays: New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, the day after Thanksgiving, and Christmas Day. Quadax offices are closed the latter half of the day on Christmas Eve. When holidays fall on Saturdays or Sundays, Quadax will observe the holiday by closing the office on a weekday adjacent to the holiday. All office closures will be announced by email to clients registered to receive notices.