| Business | Phone |
| Allied Physicians Of Michiana 130 S Main St # 250, South Bend 46601 | (574) 251-2100 |
| Integrated Billing Solutions 4755 Ameritech Dr, South Bend 46628 | (574) 271-2558 |
| Physicians Billing Svc Inc 52900 Ironwood Rd, South Bend 46635 | (574) 674-6343 |
| Qsi Electronic Billing Svc 3024 Mishawaka Ave # 101, South Bend 46615 | (574) 282-1200 |