To speak to customer service representative: Phone: 800-556-2231 To speak to an associate, or to send a fax: Phone: 314.802.6700 or 800-969-3666 Fax: 866.203.4587 To contact us by U.S. mail: Gateway EDI, Inc. One Financial Plaza 501 North Broadway, Third Floor St. Louis, MO 63102
We had issues with our other clearinghouse but have had nothing but smooth sailing with Gateway EDI.
Terry and Evann, GA