| AAA Medical Billing Service and Software |
| A California medical billing service and software provider. |
| ABC Billing Solutions |
| Provide out-patient medical billing services, including claims processing and collection services in the Triangle and Piedmont areas of North Carolina. |
| Acadiana Computer Systems, Inc |
| Provides medical billing software and practice management services. |
| Acc-Q-Data Inc |
| Provides electronic medical billing claims processing for orthotics and prosthetics. |
| Accu-Bil |
| Provides billing, collection and reporting services for health care providers. |
| Accubill, Inc |
| An electronic medical claims billing specializing in both private insurance claims and Medicare claims. |