Group Marketing Services
General information
Provider portal: groupmarketingservices.com/index.php/provi...
Phone: (269) 343-2611
Fax: (269) 349-3275
Website: groupmarketingservices.com
Claims
Group Marketing Services, Inc
PO Box 21044
Eagan, MN 55121
Additional information
Payer Number GMS01
EDI Payer # 66701