For high severity Workers’ Compensation claims, or US Longshore & Harbor claims, contact AIG Claims Offices
AIG MCU  (GB Branch 272)
6712 Brooklawn Parkway, Suite 100
Syracuse, NY 13211-2167
Toll Free: (833) 465-2501
Local: (315) 234-2601
Fax: (315) 234-2606
Email: GB-AIG_MCU-Mail@gbtpa.com
 
AIG Federal (GB Branch 273)
6712 Brooklawn Parkway, Suite 100
Syracuse, NY 13211-2167
Toll Free: (833) 465-2500
Local: (315) 234-2602
Fax: (315) 234-2607
Email: GB-AIG_Federal-Mail@gbtpa.com
 
For Claims Medical Mailing Addresses
| Benefit State(s) | Mailing Address | 
|---|
| Medical Bills |  | 
| All States except California | Gallagher Bassett Services, Inc. P.O. Box 2831
 Clinton, IA 52733-2831
 | 
| California | Gallagher Bassett Services, Inc. P.O. Box 2840
 Clinton, IA 52733-2840
 | 
| Medical Records and Correspondence (no medical bills) |  | 
| All States (Core Branches) | Gallagher Bassett Services, Inc. P.O. Box 4210
 Clinton, IA 52733-4210
 | 
| All States (MCU/Federal) | Gallagher Bassett Services, Inc. P.O. Box 4211
 Clinton, IA 52733-4211
 |