| Business | Phone |
| Best Billing 10323 San Vincente Blvd, Spring Valley 91977 | (619) 660-2770 |
| Advantage Medical Group Pc 3911 N Cordoba St # I, Spring Valley 91977 | (619) 741-2135 |
| Omega Professional Billing Svc 3113 Sweetwater Springs Bl #52, Spring Valley 91978 | (619) 757-3124 |
| International Medical Resource 10560 Madrid Way, Spring Valley 91977 | (619) 660-5446 |