| Business | Phone |
| Accordis 820 W Jackson Blvd 725, Chicago 60607 | (312) 962-6100 |
| Advanced Billing Concepts 1225 W Oakdale Ave, Chicago 60657 | (773) 248-9100 |
| Advocate Healthcare 4600 N Ravenswood Ave, Chicago 60640 | (773) 989-7272 |
| Allstat Medical Billing 5117 S Mason Ave, Chicago 60638 | (773) 838-8326 |
| Alpha Thought 547 W Jackson Blvd, Chicago 60661 | (312) 224-2000 |
| American Billing & Recove 5257 S Emerald Ave, Chicago 60609 | (773) 548-5856 |
| American Medical Billing 980 N Michigan Ave, Chicago 60611 | (312) 214-4996 |
| American Payment Systems 9405 S Union Ave, Chicago 60620 | (773) 994-1750 |
| Bar & Assoc 9885 S Charles St, Chicago 60643 | (773) 239-6388 |
| Bdp Medical Billing Svc Inc 11758 S Loomis St, Chicago 60643 | (773) 785-2090 |
| Bill Tech Consultants 5816 N Lincoln Ave, Chicago 60659 | (773) 878-2143 |
| Billing Department Inc 405 N Wabash Ave, Chicago 60611 | (312) 832-1200 |
| Billpro Chicago East 6833 S East End Ave, Chicago 60649 | (773) 493-4000 |
| Floral Designs By Fran 121 E 47th St, Chicago 60653 | (773) 268-6613 |
| Easy Notes Software 141 W Jackson Blvd A-20, Chicago 60604 | (312) 212-1602 |
| Chosen Professional 4911 W Jackson Blvd, Chicago 60644 | (773) 287-0922 |
| Dae Billing Inc 6232 N Pulaski Rd, Chicago 60646 | (312) 943-7414 |
| D & L Crossover Billings 12824 S Sangamon St, Chicago 60643 | (773) 264-2023 |
| Cpr Medical Billing 6547 N Avondale Ave 1, Chicago 60631 | (773) 775-1622 |