| Business | Phone |
| Medical Data Systems 505 S John Redditt Dr, Lufkin 75904 | (936) 699-2081 |
| Specialty Billing Svc 3416 E Denman Ave 4, Lufkin 75901 | (936) 639-3036 |
| Crager Billing Svc 202 Sandy Brook St, Lufkin 75901 | (936) 632-2280 |
| East Texas Billing Svc Inc 917 Ellis Ave, Lufkin 75904 | (936) 634-7243 |