| Business | Phone |
| Electronic Healthcare Billing 105 Beech Pl, El Cajon 92021 | (619) 328-9052 |
| Accelefunds El Cajon 92020 | (619) 440-5975 |
| Retro Medical Billing Inc 1827 Diesel Dr, El Cajon 92019 | (619) 401-0908 |
| Q A Coding & Medical Billing 577 Tilling Way, El Cajon 92020 | (619) 444-4545 |
| Howerton Management Svc 435 W Bradley Ave # D, El Cajon 92020 | (619) 873-0222 |
| Keith & Co Po Box 21400, El Cajon 92021 | (619) 444-5917 |