| Business | Phone |
| Advanced Billing Wrx 1445 Donlon St # 2, Ventura 93003 | (805) 642-4163 |
| Healthline 20 Imperial Ave, Ventura 93004 | (805) 647-6893 |
| Loma Vista Medical Billing 3418 Loma Vista Rd, Ventura 93003 | (805) 642-8565 |
| Medisoft Billing Software 2290 Eastman Ave # 103, Ventura 93003 | (805) 658-2552 |
| Pediatric Billing Svc 5850 Thille St, Ventura 93003 | (805) 650-1965 |
| Petit Service Co 970 Petit Ave # A, Ventura 93004 | (805) 659-1333 |